Travis: Build tests on Ubuntu 18.04 with docker
Travis: Build tests on Ubuntu 18.04 with docker

jambolo/bitcoin,droark/bitcoin,pataquets/namecoin-core,Xekyo/bitcoin,vertcoin/vertcoin,prusnak/bitcoin,mm-s/bitcoin,myriadteam/myriadcoin,ajtowns/bitcoin,peercoin/peercoin,RHavar/bitcoin,apoelstra/bitcoin,digibyte/digibyte,vmp32k/litecoin,jtimon/bitcoin,MarcoFalke/bitcoin,MeshCollider/bitcoin,nikkitan/bitcoin,OmniLayer/omnicore,pataquets/namecoin-core,domob1812/huntercore,GlobalBoost/GlobalBoost,apoelstra/bitcoin,jtimon/bitcoin,dscotese/bitcoin,pataquets/namecoin-core,domob1812/huntercore,Kogser/bitcoin,bitcoin/bitcoin,jnewbery/bitcoin,AkioNak/bitcoin,dscotese/bitcoin,cdecker/bitcoin,r8921039/bitcoin,sebrandon1/bitcoin,qtumproject/qtum,MeshCollider/bitcoin,andreaskern/bitcoin,nikkitan/bitcoin,jamesob/bitcoin,ericshawlinux/bitcoin,jlopp/statoshi,jlopp/statoshi,tjps/bitcoin,dscotese/bitcoin,OmniLayer/omnicore,digibyte/digibyte,jtimon/bitcoin,midnightmagic/bitcoin,digibyte/digibyte,andreaskern/bitcoin,FeatherCoin/Feathercoin,andreaskern/bitcoin,mruddy/bitcoin,sstone/bitcoin,anditto/bitcoin,domob1812/huntercore,h4x3rotab/BTCGPU,myriadteam/myriadcoin,bespike/litecoin,namecoin/namecore,guncoin/guncoin,untrustbank/litecoin,EthanHeilman/bitcoin,lateminer/bitcoin,sipsorcery/bitcoin,jmcorgan/bitcoin,practicalswift/bitcoin,MarcoFalke/bitcoin,GroestlCoin/GroestlCoin,tecnovert/particl-core,jambolo/bitcoin,rnicoll/bitcoin,bitcoinknots/bitcoin,tecnovert/particl-core,sstone/bitcoin,afk11/bitcoin,jamesob/bitcoin,n1bor/bitcoin,midnightmagic/bitcoin,sipsorcery/bitcoin,MarcoFalke/bitcoin,DigitalPandacoin/pandacoin,tecnovert/particl-core,GlobalBoost/GlobalBoost,CryptArc/bitcoin,h4x3rotab/BTCGPU,afk11/bitcoin,achow101/bitcoin,gjhiggins/vcoincore,rnicoll/dogecoin,fanquake/bitcoin,Flowdalic/bitcoin,prusnak/bitcoin,afk11/bitcoin,bitcoin/bitcoin,sstone/bitcoin,bespike/litecoin,domob1812/bitcoin,achow101/bitcoin,EthanHeilman/bitcoin,litecoin-project/litecoin,bespike/litecoin,alecalve/bitcoin,Flowdalic/bitcoin,jambolo/bitcoin,fujicoin/fujicoin,prusnak/bitcoin,n1bor/bitcoin,ajtowns/bitcoin,qtumproject/qtum,jamesob/bitcoin,h4x3rotab/BTCGPU,bitcoin/bitcoin,MarcoFalke/bitcoin,digibyte/digibyte,domob1812/bitcoin,Sjors/bitcoin,rnicoll/dogecoin,Xekyo/bitcoin,ElementsProject/elements,OmniLayer/omnicore,fanquake/bitcoin,vertcoin/vertcoin,gjhiggins/vcoincore,bitcoinknots/bitcoin,mitchellcash/bitcoin,untrustbank/litecoin,nikkitan/bitcoin,bespike/litecoin,wellenreiter01/Feathercoin,vmp32k/litecoin,bitcoinknots/bitcoin,kazcw/bitcoin,fanquake/bitcoin,r8921039/bitcoin,kazcw/bitcoin,qtumproject/qtum,CryptArc/bitcoin,Christewart/bitcoin,instagibbs/bitcoin,monacoinproject/monacoin,FeatherCoin/Feathercoin,rnicoll/bitcoin,alecalve/bitcoin,GroestlCoin/GroestlCoin,kazcw/bitcoin,yenliangl/bitcoin,Xekyo/bitcoin,tjps/bitcoin,ajtowns/bitcoin,myriadcoin/myriadcoin,joshrabinowitz/bitcoin,mitchellcash/bitcoin,MeshCollider/bitcoin,mm-s/bitcoin,OmniLayer/omnicore,particl/particl-core,AkioNak/bitcoin,rawodb/bitcoin,randy-waterhouse/bitcoin,lateminer/bitcoin,droark/bitcoin,lbryio/lbrycrd,thrasher-/litecoin,Bushstar/UFO-Project,namecoin/namecoin-core,jnewbery/bitcoin,Bushstar/UFO-Project,Kogser/bitcoin,lbryio/lbrycrd,digibyte/digibyte,EthanHeilman/bitcoin,peercoin/peercoin,ahmedbodi/vertcoin,myriadcoin/myriadcoin,fujicoin/fujicoin,droark/bitcoin,GroestlCoin/bitcoin,lateminer/bitcoin,vmp32k/litecoin,peercoin/peercoin,achow101/bitcoin,GroestlCoin/bitcoin,practicalswift/bitcoin,alecalve/bitcoin,randy-waterhouse/bitcoin,rnicoll/dogecoin,litecoin-project/litecoin,sipsorcery/bitcoin,rnicoll/bitcoin,GlobalBoost/GlobalBoost,jnewbery/bitcoin,Christewart/bitcoin,cdecker/bitcoin,Kogser/bitcoin,r8921039/bitcoin,rawodb/bitcoin,Flowdalic/bitcoin,pataquets/namecoin-core,bitcoin/bitcoin,midnightmagic/bitcoin,ajtowns/bitcoin,digibyte/digibyte,bitcoinsSG/bitcoin,jamesob/bitcoin,sipsorcery/bitcoin,pstratem/bitcoin,r8921039/bitcoin,litecoin-project/litecoin,BTCGPU/BTCGPU,thrasher-/litecoin,Kogser/bitcoin,RHavar/bitcoin,anditto/bitcoin,GroestlCoin/bitcoin,Kogser/bitcoin,ElementsProject/elements,Kogser/bitcoin,tecnovert/particl-core,joshrabinowitz/bitcoin,DigitalPandacoin/pandacoin,n1bor/bitcoin,CryptArc/bitcoin,namecoin/namecoin-core,pstratem/bitcoin,vertcoin/vertcoin,domob1812/namecore,rawodb/bitcoin,vertcoin/vertcoin,Kogser/bitcoin,ericshawlinux/bitcoin,MeshCollider/bitcoin,jonasschnelli/bitcoin,GlobalBoost/GlobalBoost,tjps/bitcoin,yenliangl/bitcoin,n1bor/bitcoin,ericshawlinux/bitcoin,rawodb/bitcoin,BTCGPU/BTCGPU,instagibbs/bitcoin,mruddy/bitcoin,ahmedbodi/vertcoin,ajtowns/bitcoin,Christewart/bitcoin,rawodb/bitcoin,domob1812/huntercore,vmp32k/litecoin,ericshawlinux/bitcoin,dscotese/bitcoin,Xekyo/bitcoin,lbryio/lbrycrd,kallewoof/bitcoin,bespike/litecoin,kallewoof/bitcoin,jmcorgan/bitcoin,domob1812/bitcoin,JeremyRubin/bitcoin,fanquake/bitcoin,anditto/bitcoin,mm-s/bitcoin,AkioNak/bitcoin,GroestlCoin/bitcoin,kazcw/bitcoin,kallewoof/bitcoin,cdecker/bitcoin,EthanHeilman/bitcoin,apoelstra/bitcoin,myriadteam/myriadcoin,Sjors/bitcoin,litecoin-project/litecoin,namecoin/namecoin-core,jmcorgan/bitcoin,Bushstar/UFO-Project,thrasher-/litecoin,jlopp/statoshi,domob1812/huntercore,jamesob/bitcoin,rawodb/bitcoin,nikkitan/bitcoin,jmcorgan/bitcoin,domob1812/namecore,randy-waterhouse/bitcoin,jmcorgan/bitcoin,litecoin-project/litecoin,sebrandon1/bitcoin,CryptArc/bitcoin,bitcoinknots/bitcoin,bitcoin/bitcoin,jtimon/bitcoin,prusnak/bitcoin,rnicoll/bitcoin,nikkitan/bitcoin,yenliangl/bitcoin,GroestlCoin/GroestlCoin,particl/particl-core,jtimon/bitcoin,Flowdalic/bitcoin,namecoin/namecoin-core,jonasschnelli/bitcoin,pataquets/namecoin-core,namecoin/namecore,sebrandon1/bitcoin,EthanHeilman/bitcoin,monacoinproject/monacoin,Flowdalic/bitcoin,Xekyo/bitcoin,monacoinproject/monacoin,cdecker/bitcoin,DigitalPandacoin/pandacoin,kallewoof/bitcoin,namecoin/namecore,h4x3rotab/BTCGPU,Kogser/bitcoin,peercoin/peercoin,ahmedbodi/vertcoin,nikkitan/bitcoin,practicalswift/bitcoin,wellenreiter01/Feathercoin,monacoinproject/monacoin,qtumproject/qtum,BTCGPU/BTCGPU,jonasschnelli/bitcoin,myriadcoin/myriadcoin,guncoin/guncoin,domob1812/huntercore,bitcoinknots/bitcoin,joshrabinowitz/bitcoin,bespike/litecoin,RHavar/bitcoin,AkioNak/bitcoin,jonasschnelli/bitcoin,CryptArc/bitcoin,jmcorgan/bitcoin,mitchellcash/bitcoin,mitchellcash/bitcoin,untrustbank/litecoin,r8921039/bitcoin,JeremyRubin/bitcoin,lateminer/bitcoin,BTCGPU/BTCGPU,mitchellcash/bitcoin,ElementsProject/elements,Sjors/bitcoin,pataquets/namecoin-core,dscotese/bitcoin,ahmedbodi/vertcoin,afk11/bitcoin,lateminer/bitcoin,r8921039/bitcoin,jtimon/bitcoin,BTCGPU/BTCGPU,tjps/bitcoin,bitcoinsSG/bitcoin,achow101/bitcoin,instagibbs/bitcoin,alecalve/bitcoin,prusnak/bitcoin,mruddy/bitcoin,joshrabinowitz/bitcoin,particl/particl-core,ElementsProject/elements,Kogser/bitcoin,achow101/bitcoin,rnicoll/bitcoin,Sjors/bitcoin,guncoin/guncoin,fanquake/bitcoin,rnicoll/dogecoin,midnightmagic/bitcoin,jnewbery/bitcoin,untrustbank/litecoin,GlobalBoost/GlobalBoost,untrustbank/litecoin,domob1812/bitcoin,OmniLayer/omnicore,GroestlCoin/GroestlCoin,tjps/bitcoin,peercoin/peercoin,jnewbery/bitcoin,pstratem/bitcoin,pstratem/bitcoin,namecoin/namecore,GroestlCoin/bitcoin,myriadteam/myriadcoin,namecoin/namecoin-core,GroestlCoin/bitcoin,mruddy/bitcoin,qtumproject/qtum,pstratem/bitcoin,sstone/bitcoin,DigitalPandacoin/pandacoin,instagibbs/bitcoin,JeremyRubin/bitcoin,alecalve/bitcoin,Bushstar/UFO-Project,h4x3rotab/BTCGPU,prusnak/bitcoin,n1bor/bitcoin,wellenreiter01/Feathercoin,Christewart/bitcoin,droark/bitcoin,jamesob/bitcoin,vertcoin/vertcoin,rnicoll/bitcoin,apoelstra/bitcoin,midnightmagic/bitcoin,cdecker/bitcoin,domob1812/namecore,jambolo/bitcoin,apoelstra/bitcoin,RHavar/bitcoin,gjhiggins/vcoincore,kallewoof/bitcoin,DigitalPandacoin/pandacoin,EthanHeilman/bitcoin,DigitalPandacoin/pandacoin,thrasher-/litecoin,ericshawlinux/bitcoin,randy-waterhouse/bitcoin,JeremyRubin/bitcoin,lbryio/lbrycrd,guncoin/guncoin,FeatherCoin/Feathercoin,joshrabinowitz/bitcoin,jlopp/statoshi,myriadcoin/myriadcoin,yenliangl/bitcoin,GroestlCoin/GroestlCoin,tecnovert/particl-core,jambolo/bitcoin,midnightmagic/bitcoin,bitcoinsSG/bitcoin,yenliangl/bitcoin,joshrabinowitz/bitcoin,droark/bitcoin,domob1812/namecore,ahmedbodi/vertcoin,particl/particl-core,Christewart/bitcoin,Kogser/bitcoin,anditto/bitcoin,FeatherCoin/Feathercoin,Bushstar/UFO-Project,particl/particl-core,MeshCollider/bitcoin,sebrandon1/bitcoin,bitcoinsSG/bitcoin,h4x3rotab/BTCGPU,guncoin/guncoin,jonasschnelli/bitcoin,myriadcoin/myriadcoin,jlopp/statoshi,lateminer/bitcoin,sebrandon1/bitcoin,JeremyRubin/bitcoin,bitcoinsSG/bitcoin,instagibbs/bitcoin,n1bor/bitcoin,ElementsProject/elements,fujicoin/fujicoin,alecalve/bitcoin,domob1812/bitcoin,anditto/bitcoin,mruddy/bitcoin,fujicoin/fujicoin,jambolo/bitcoin,OmniLayer/omnicore,kazcw/bitcoin,rnicoll/dogecoin,myriadcoin/myriadcoin,RHavar/bitcoin,Christewart/bitcoin,sstone/bitcoin,practicalswift/bitcoin,randy-waterhouse/bitcoin,bitcoinsSG/bitcoin,pstratem/bitcoin,gjhiggins/vcoincore,peercoin/peercoin,afk11/bitcoin,FeatherCoin/Feathercoin,gjhiggins/vcoincore,fujicoin/fujicoin,FeatherCoin/Feathercoin,gjhiggins/vcoincore,mm-s/bitcoin,tjps/bitcoin,yenliangl/bitcoin,Xekyo/bitcoin,lbryio/lbrycrd,untrustbank/litecoin,particl/particl-core,kazcw/bitcoin,mruddy/bitcoin,monacoinproject/monacoin,RHavar/bitcoin,AkioNak/bitcoin,apoelstra/bitcoin,lbryio/lbrycrd,MarcoFalke/bitcoin,JeremyRubin/bitcoin,Sjors/bitcoin,wellenreiter01/Feathercoin,lbryio/lbrycrd,sstone/bitcoin,cdecker/bitcoin,fujicoin/fujicoin,ericshawlinux/bitcoin,myriadteam/myriadcoin,litecoin-project/litecoin,ahmedbodi/vertcoin,domob1812/bitcoin,randy-waterhouse/bitcoin,CryptArc/bitcoin,sipsorcery/bitcoin,anditto/bitcoin,qtumproject/qtum,bitcoin/bitcoin,AkioNak/bitcoin,ajtowns/bitcoin,instagibbs/bitcoin,namecoin/namecoin-core,fanquake/bitcoin,mitchellcash/bitcoin,droark/bitcoin,sebrandon1/bitcoin,BTCGPU/BTCGPU,achow101/bitcoin,domob1812/namecore,dscotese/bitcoin,Flowdalic/bitcoin,thrasher-/litecoin,Bushstar/UFO-Project,mm-s/bitcoin,GlobalBoost/GlobalBoost,GroestlCoin/GroestlCoin,sipsorcery/bitcoin,myriadteam/myriadcoin,vmp32k/litecoin,afk11/bitcoin,guncoin/guncoin,namecoin/namecore,vmp32k/litecoin,MeshCollider/bitcoin,ElementsProject/elements,monacoinproject/monacoin,Kogser/bitcoin,Kogser/bitcoin,vertcoin/vertcoin,mm-s/bitcoin,wellenreiter01/Feathercoin,tecnovert/particl-core,practicalswift/bitcoin,MarcoFalke/bitcoin,thrasher-/litecoin,practicalswift/bitcoin,kallewoof/bitcoin,domob1812/namecore,andreaskern/bitcoin,jlopp/statoshi,qtumproject/qtum,namecoin/namecore,wellenreiter01/Feathercoin,andreaskern/bitcoin,GlobalBoost/GlobalBoost,andreaskern/bitcoin