Only run travis push build on master branch
Only run travis push build on master branch

Fix the fact that, on each PRs, 2 travis builds are runned
avimehta/amphtml,Gregable/amphtml,burtcorp/amphtml,alanorozco/amphtml,alanorozco/amphtml,amoad-amoe/amphtml,yandex-pcode/amphtml,amoad-amoe/amphtml,src-code/amphtml,widespace-os/amphtml,rsimha-amp/amphtml,kixer-com/amphtml,ecoron/amphtml,jasti/amphtml,laterpay/amphtml,spotxchange/amphtml,simplereach/amphtml,smartadserver/amphtml,erwinmombay/amphtml,lannka/amphtml,aghassemi/amphtml,comScore/amphtml,mhc-gh/amphtml,bpaduch/amphtml,zhouyx/amphtml,zhucl/amphtml,prateekbh/amphtml,devjsun/amphtml,voyagegroup/amphtml,donttrustthisbot/amphtml,yevheniiminin/amphtml,DAC-f1h-dev/amphtml,honeybadgerdontcare/amphtml,zhouyx/amphtml,yieldmo/amphtml,lannka/amphtml,clawr/amphtml,prateekbh/amphtml,ADITION/amphtml,fullspeed-sp/amphtml,nathangoulding/amphtml,Lith/amphtml,zhangsu/amphtml,sklobovskaya/amphtml,kixer-com/amphtml,devjsun/amphtml,pedjoni8/amphtml,prateekbh/amphtml,ruturajv-media-net/amphtml,devjsun/amphtml,triplelift/amphtml,tlong2/amphtml,camelburrito/amphtml,smartadserver/amphtml,BrightcoveOS/amphtml,wjfang/amphtml,amoad-amoe/amphtml,jmadler/amphtml,Mixpo/amphtml,laterpay/amphtml,Lith/amphtml,DistroScale/amphtml,taboola/amphtml,dotandads/amphtml,yevheniiminin/amphtml,ericlindley-g/amphtml,keithwrightbos/amphtml,kamtschatka/amphtml,widespace-os/amphtml,dotandads/amphtml,smartadserver/amphtml,media-net/amphtml,NataliaLKB/amphtml,wjfang/amphtml,wjfang/amphtml,tdrl/amphtml,arealit/amphtml,mhc-gh/amphtml,techhtml/amphtml,camelburrito/amphtml,avimehta/amphtml,tdrl/amphtml,media-net/amphtml,aghassemi/amphtml,rsimha-amp/amphtml,bpaduch/amphtml,Mixpo/amphtml,burtcorp/amphtml,Gregable/amphtml,DistroScale/amphtml,rifler/amphtml,kixer-com/amphtml,adup-tech/amphtml,sharethrough/amphtml,Mixpo/amphtml,rifler/amphtml,vmarteev/amphtml,keithwrightbos/amphtml,luciancrasovan/amphtml,koshka/amphtml,DAC-f1h-dev/amphtml,amoad-amoe/amphtml,nexxtv/amphtml,DarXector/amphtml,loic-seguin/amphtml,sebastianbenz/amphtml,BrightcoveOS/amphtml,alanorozco/amphtml,comScore/amphtml,prateekbh/amphtml,rajkumarsrk/amphtml,engtat/amphtml,DarXector/amphtml,ColombiaAnalytics/amphtml,donttrustthisbot/amphtml,powdercloud/amphtml,clawr/amphtml,tlong2/amphtml,powdercloud/amphtml,amoad-amoe/amphtml,camelburrito/amphtml,devjsun/amphtml,Gregable/amphtml,adiant/amphtml,yevheniiminin/amphtml,ColombiaAnalytics/amphtml,taboola/amphtml,chaveznvg/amphtml,mkhatib/amphtml,kixer-com/amphtml,cvializ/amphtml,ADITION/amphtml,adiant/amphtml,adtechnology/amphtml,yevheniiminin/amphtml,danielrozenberg/amphtml,taboola/amphtml,mhc-gh/amphtml,arealit/amphtml,BenDz/amphtml,ericlindley-g/amphtml,Adtoma/amphtml,jdelhommeau/amphtml,zhucl/amphtml,cory-work/amphtml,criteo-forks/amphtml,lannka/amphtml,prateekbh/amphtml,kamtschatka/amphtml,BenDz/amphtml,jlucero-contentad/amphtml,taboola/amphtml,Re-lM/amphtml,zhouyx/amphtml,yieldmo/amphtml,tlong2/amphtml,JuliusThms/amphtml,interspacejp/amphtml,ADITION/amphtml,Mobusi-ads/amphtml,camelburrito/amphtml,zhucl/amphtml,powdercloud/amphtml,pedjoni8/amphtml,sklobovskaya/amphtml,chaveznvg/amphtml,techhtml/amphtml,fullspeed-sp/amphtml,erwinmombay/amphtml,ColombiaAnalytics/amphtml,zhucl/amphtml,cvializ/amphtml,triplelift/amphtml,clawr/amphtml,jridgewell/amphtml,rajkumarsrk/amphtml,chaveznvg/amphtml,jmadler/amphtml,dvoytenko/amphtml,BenDz/amphtml-atinternet,nexxtv/amphtml,galeksic/amphtml,Adtoma/amphtml,jpettitt/amphtml,wjfang/amphtml,jridgewell/amphtml,engtat/amphtml,fullspeed-sp/amphtml,src-code/amphtml,nexxtv/amphtml,yieldbot/amphtml,ruturajv-media-net/amphtml,smartadserver/amphtml,sortable/amphtml,AaronCritchley/amphtml,zhangsu/amphtml,engtat/amphtml,wjfang/amphtml,mhc-gh/amphtml,comScore/amphtml,JuliusThms/amphtml,gumgum/amphtml,powdercloud/amphtml,media-net/amphtml,interspacejp/amphtml,BrightcoveOS/amphtml,ampproject/amphtml,BenDz/amphtml,sebastianbenz/amphtml,chaveznvg/amphtml,mkhatib/amphtml,burtcorp/amphtml,yandex-pcode/amphtml,keithwrightbos/amphtml,rifler/amphtml,mlb7687/amphtml,gumgum/amphtml,alanorozco/amphtml,rajkumarsrk/amphtml,jasti/amphtml,jridgewell/amphtml,lzanol/amphtml,aghassemi/amphtml,sriramkrish85/amphtml,keithwrightbos/amphtml,jpettitt/amphtml,ruturajv-media-net/amphtml,rlugojr/amphtml,Lith/amphtml,zhucl/amphtml,Gregable/amphtml,jpettitt/amphtml,avimehta/amphtml,AaronCritchley/amphtml,yevheniiminin/amphtml,donttrustthisbot/amphtml,criteo-forks/amphtml,jdelhommeau/amphtml,sortable/amphtml,gumgum/amphtml,engtat/amphtml,pedjoni8/amphtml,powdercloud/amphtml,britice/amphtml,lzanol/amphtml,sortable/amphtml,nexxtv/amphtml,Lith/amphtml,DistroScale/amphtml,interspacejp/amphtml,widespace-os/amphtml,cory-work/amphtml,DAC-f1h-dev/amphtml,mlb7687/amphtml,luciancrasovan/amphtml,Mixpo/amphtml,sebastianbenz/amphtml,adtechnology/amphtml,widespace-os/amphtml,dotandads/amphtml,honeybadgerdontcare/amphtml,jlucero-contentad/amphtml,ecoron/amphtml,aghassemi/amphtml,smartadserver/amphtml,nekodo/amphtml,nathangoulding/amphtml,jmadler/amphtml,nekodo/amphtml,Mobusi-ads/amphtml,arealit/amphtml,shawnbuso/amphtml,dvoytenko/amphtml,spotxchange/amphtml,src-code/amphtml,AaronCritchley/amphtml,mlb7687/amphtml,koshka/amphtml,luciancrasovan/amphtml,criteo-forks/amphtml,Re-lM/amphtml,ithinkihaveacat/amphtml,keithwrightbos/amphtml,BenDz/amphtml-atinternet,yandex-pcode/amphtml,rsimha-amp/amphtml,kamtschatka/amphtml,jdelhommeau/amphtml,nathangoulding/amphtml,laterpay/amphtml,tdrl/amphtml,pietergreyling/amphtml,adup-tech/amphtml,Mobusi-ads/amphtml,luciancrasovan/amphtml,spotxchange/amphtml,arealit/amphtml,Meggin/amphtml,ericlindley-g/amphtml,BrightcoveOS/amphtml,gumgum/amphtml,avimehta/amphtml,sriramkrish85/amphtml,comScore/amphtml,ericlindley-g/amphtml,adup-tech/amphtml,DarXector/amphtml,honeybadgerdontcare/amphtml,danielrozenberg/amphtml,ADITION/amphtml,lannka/amphtml,prateekbh/amphtml,kamtschatka/amphtml,jridgewell/amphtml,koshka/amphtml,jlucero-contentad/amphtml,Mobusi-ads/amphtml,prateekbh/amphtml,britice/amphtml,Re-lM/amphtml,pietergreyling/amphtml,donttrustthisbot/amphtml,criteo-forks/amphtml,dotandads/amphtml,plista/amphtml,ruturajv-media-net/amphtml,pietergreyling/amphtml,rlugojr/amphtml,cvializ/amphtml,avimehta/amphtml,sharethrough/amphtml,Re-lM/amphtml,shawnbuso/amphtml,vmarteev/amphtml,zhouyx/amphtml,dotandads/amphtml,kamtschatka/amphtml,clawr/amphtml,Adtoma/amphtml,jasti/amphtml,jmadler/amphtml,ericlindley-g/amphtml,DarXector/amphtml,jridgewell/amphtml,ecoron/amphtml,techhtml/amphtml,kixer-com/amphtml,yandex-pcode/amphtml,rsimha-amp/amphtml,sklobovskaya/amphtml,erwinmombay/amphtml,alanorozco/amphtml,galeksic/amphtml,cory-work/amphtml,JuliusThms/amphtml,kmh287/amphtml,rifler/amphtml,pietergreyling/amphtml,donttrustthisbot/amphtml,aghassemi/amphtml,jridgewell/amphtml,jlucero-contentad/amphtml,vmarteev/amphtml,rifler/amphtml,vmarteev/amphtml,camelburrito/amphtml,aghassemi/amphtml,erwinmombay/amphtml,jridgewell/amphtml,techhtml/amphtml,voyagegroup/amphtml,lannka/amphtml,BenDz/amphtml,Gregable/amphtml,wjfang/amphtml,keithwrightbos/amphtml,sriramkrish85/amphtml,honeybadgerdontcare/amphtml,JuliusThms/amphtml,zhangsu/amphtml,spotxchange/amphtml,engtat/amphtml,jpettitt/amphtml,amoad-amoe/amphtml,danielrozenberg/amphtml,rifler/amphtml,camelburrito/amphtml,mhc-gh/amphtml,jmadler/amphtml,luciancrasovan/amphtml,shawnbuso/amphtml,fullspeed-sp/amphtml,rajkumarsrk/amphtml,engtat/amphtml,nekodo/amphtml,danielrozenberg/amphtml,gumgum/amphtml,AaronCritchley/amphtml,koshka/amphtml,jpettitt/amphtml,sklobovskaya/amphtml,arealit/amphtml,kmh287/amphtml,nathangoulding/amphtml,ithinkihaveacat/amphtml,criteo-forks/amphtml,erwinmombay/amphtml,zhouyx/amphtml,dvoytenko/amphtml,zhouyx/amphtml,mlb7687/amphtml,gumgum/amphtml,widespace-os/amphtml,bpaduch/amphtml,alanorozco/amphtml,jasti/amphtml,src-code/amphtml,plista/amphtml,DAC-f1h-dev/amphtml,zhangsu/amphtml,media-net/amphtml,adiant/amphtml,mhc-gh/amphtml,zhangsu/amphtml,ecoron/amphtml,adtechnology/amphtml,rlugojr/amphtml,loic-seguin/amphtml,ericlindley-g/amphtml,adup-tech/amphtml,spotxchange/amphtml,bpaduch/amphtml,keithwrightbos/amphtml,adup-tech/amphtml,nexxtv/amphtml,src-code/amphtml,rajkumarsrk/amphtml,luciancrasovan/amphtml,adtechnology/amphtml,sklobovskaya/amphtml,criteo-forks/amphtml,yandex-pcode/amphtml,alanorozco/amphtml,galeksic/amphtml,kamtschatka/amphtml,rlugojr/amphtml,jlucero-contentad/amphtml,sharethrough/amphtml,zhucl/amphtml,voyagegroup/amphtml,kmh287/amphtml,shawnbuso/amphtml,triplelift/amphtml,koshka/amphtml,ithinkihaveacat/amphtml,devjsun/amphtml,jasti/amphtml,media-net/amphtml,koshka/amphtml,tlong2/amphtml,tdrl/amphtml,JuliusThms/amphtml,Adtoma/amphtml,taboola/amphtml,ecoron/amphtml,dvoytenko/amphtml,vmarteev/amphtml,simplereach/amphtml,yieldbot/amphtml,jmadler/amphtml,yieldmo/amphtml,clawr/amphtml,ecoron/amphtml,rajkumarsrk/amphtml,smartadserver/amphtml,adup-tech/amphtml,dvoytenko/amphtml,adtechnology/amphtml,media-net/amphtml,honeybadgerdontcare/amphtml,NataliaLKB/amphtml,yieldmo/amphtml,yandex-pcode/amphtml,lzanol/amphtml,interspacejp/amphtml,yieldmo/amphtml,cvializ/amphtml,fullspeed-sp/amphtml,interspacejp/amphtml,tlong2/amphtml,Gregable/amphtml,mhc-gh/amphtml,bpaduch/amphtml,voyagegroup/amphtml,Gregable/amphtml,Meggin/amphtml,erwinmombay/amphtml,jlucero-contentad/amphtml,cvializ/amphtml,honeybadgerdontcare/amphtml,fullspeed-sp/amphtml,mkhatib/amphtml,engtat/amphtml,Adtoma/amphtml,danielrozenberg/amphtml,plista/amphtml,sklobovskaya/amphtml,gumgum/amphtml,AaronCritchley/amphtml,voyagegroup/amphtml,devjsun/amphtml,NataliaLKB/amphtml,danielrozenberg/amphtml,vmarteev/amphtml,BenDz/amphtml-atinternet,Mixpo/amphtml,vmarteev/amphtml,laterpay/amphtml,BrightcoveOS/amphtml,sebastianbenz/amphtml,triplelift/amphtml,rlugojr/amphtml,jasti/amphtml,zhucl/amphtml,adiant/amphtml,Lith/amphtml,adiant/amphtml,ampproject/amphtml,sklobovskaya/amphtml,adiant/amphtml,chaveznvg/amphtml,voyagegroup/amphtml,ColombiaAnalytics/amphtml,triplelift/amphtml,loic-seguin/amphtml,laterpay/amphtml,tdrl/amphtml,dotandads/amphtml,Meggin/amphtml,mlb7687/amphtml,alanorozco/amphtml,rsimha-amp/amphtml,cory-work/amphtml,rsimha-amp/amphtml,kmh287/amphtml,mkhatib/amphtml,rajkumarsrk/amphtml,clawr/amphtml,shawnbuso/amphtml,Adtoma/amphtml,comScore/amphtml,Mixpo/amphtml,DarXector/amphtml,sriramkrish85/amphtml,BenDz/amphtml,shawnbuso/amphtml,adtechnology/amphtml,arealit/amphtml,sharethrough/amphtml,BenDz/amphtml,tlong2/amphtml,burtcorp/amphtml,nexxtv/amphtml,ampproject/amphtml,yieldbot/amphtml,BrightcoveOS/amphtml,powdercloud/amphtml,spotxchange/amphtml,cvializ/amphtml,donttrustthisbot/amphtml,ampproject/amphtml,voyagegroup/amphtml,pietergreyling/amphtml,triplelift/amphtml,ruturajv-media-net/amphtml,sortable/amphtml,nekodo/amphtml,sriramkrish85/amphtml,mkhatib/amphtml,sharethrough/amphtml,loic-seguin/amphtml,dvoytenko/amphtml,jdelhommeau/amphtml,donttrustthisbot/amphtml,ampproject/amphtml,media-net/amphtml,jpettitt/amphtml,rsimha-amp/amphtml,taboola/amphtml,jpettitt/amphtml,techhtml/amphtml,ampproject/amphtml,DAC-f1h-dev/amphtml,JuliusThms/amphtml,ithinkihaveacat/amphtml,comScore/amphtml,cory-work/amphtml,galeksic/amphtml,nexxtv/amphtml,mlb7687/amphtml,plista/amphtml,comScore/amphtml,cory-work/amphtml,lzanol/amphtml,kmh287/amphtml,yieldbot/amphtml,lzanol/amphtml,adiant/amphtml,galeksic/amphtml,jdelhommeau/amphtml,src-code/amphtml,burtcorp/amphtml,kixer-com/amphtml,tdrl/amphtml,powdercloud/amphtml,DAC-f1h-dev/amphtml,mhc-gh/amphtml,danielrozenberg/amphtml,yieldbot/amphtml,britice/amphtml,yevheniiminin/amphtml,sebastianbenz/amphtml,yandex-pcode/amphtml,Gregable/amphtml,Lith/amphtml,danielrozenberg/amphtml,lzanol/amphtml,DistroScale/amphtml,mkhatib/amphtml,techhtml/amphtml,britice/amphtml,Mobusi-ads/amphtml,Mobusi-ads/amphtml,yieldbot/amphtml,pietergreyling/amphtml,sortable/amphtml,jpettitt/amphtml,kmh287/amphtml,NataliaLKB/amphtml,pedjoni8/amphtml,ruturajv-media-net/amphtml,burtcorp/amphtml,clawr/amphtml,chaveznvg/amphtml,jdelhommeau/amphtml,ADITION/amphtml,sriramkrish85/amphtml,sortable/amphtml,lannka/amphtml,kixer-com/amphtml,avimehta/amphtml,laterpay/amphtml,widespace-os/amphtml,camelburrito/amphtml,zhangsu/amphtml,DarXector/amphtml,rlugojr/amphtml,sharethrough/amphtml,media-net/amphtml,DistroScale/amphtml,simplereach/amphtml,lannka/amphtml,interspacejp/amphtml,shawnbuso/amphtml,arealit/amphtml,cory-work/amphtml,luciancrasovan/amphtml,ampproject/amphtml,wjfang/amphtml,pedjoni8/amphtml,yieldmo/amphtml,DistroScale/amphtml,yieldmo/amphtml,taboola/amphtml,bpaduch/amphtml,AaronCritchley/amphtml,pedjoni8/amphtml,honeybadgerdontcare/amphtml,sebastianbenz/amphtml,bpaduch/amphtml,zhouyx/amphtml,ampproject/amphtml