Do not specify sudo in .travis
Do not specify sudo in .travis

Travis is deprecating the `sudo` keyword and moves everything to
the same infrastructure (sudo really selects between two infrastructures).

See https://blog.travis-ci.com/2018-11-19-required-linux-infrastructure-migration?utm_source=in-app&utm_medium=intercom for more info.
dscotese/bitcoin,vertcoin/vertcoin,achow101/bitcoin,litecoin-project/litecoin,rnicoll/bitcoin,litecoin-project/litecoin,DigitalPandacoin/pandacoin,FeatherCoin/Feathercoin,achow101/bitcoin,lateminer/bitcoin,r8921039/bitcoin,pstratem/bitcoin,jamesob/bitcoin,afk11/bitcoin,bespike/litecoin,EthanHeilman/bitcoin,monacoinproject/monacoin,mitchellcash/bitcoin,n1bor/bitcoin,ElementsProject/elements,dscotese/bitcoin,instagibbs/bitcoin,yenliangl/bitcoin,pataquets/namecoin-core,Sjors/bitcoin,nikkitan/bitcoin,OmniLayer/omnicore,nikkitan/bitcoin,tecnovert/particl-core,jonasschnelli/bitcoin,MeshCollider/bitcoin,jambolo/bitcoin,instagibbs/bitcoin,EthanHeilman/bitcoin,alecalve/bitcoin,n1bor/bitcoin,gjhiggins/vcoincore,AkioNak/bitcoin,gjhiggins/vcoincore,jnewbery/bitcoin,qtumproject/qtum,domob1812/bitcoin,domob1812/namecore,sipsorcery/bitcoin,sipsorcery/bitcoin,Xekyo/bitcoin,domob1812/namecore,mm-s/bitcoin,GroestlCoin/GroestlCoin,Sjors/bitcoin,bitcoin/bitcoin,myriadteam/myriadcoin,rnicoll/bitcoin,yenliangl/bitcoin,instagibbs/bitcoin,mm-s/bitcoin,Xekyo/bitcoin,CryptArc/bitcoin,GroestlCoin/GroestlCoin,pataquets/namecoin-core,cdecker/bitcoin,domob1812/bitcoin,fujicoin/fujicoin,yenliangl/bitcoin,jambolo/bitcoin,jambolo/bitcoin,fujicoin/fujicoin,MeshCollider/bitcoin,practicalswift/bitcoin,wellenreiter01/Feathercoin,n1bor/bitcoin,pstratem/bitcoin,yenliangl/bitcoin,gjhiggins/vcoincore,andreaskern/bitcoin,wellenreiter01/Feathercoin,OmniLayer/omnicore,sstone/bitcoin,pstratem/bitcoin,Xekyo/bitcoin,CryptArc/bitcoin,namecoin/namecore,Xekyo/bitcoin,bitcoinknots/bitcoin,pataquets/namecoin-core,myriadteam/myriadcoin,particl/particl-core,namecoin/namecore,tecnovert/particl-core,jtimon/bitcoin,qtumproject/qtum,rnicoll/dogecoin,kallewoof/bitcoin,qtumproject/qtum,prusnak/bitcoin,monacoinproject/monacoin,practicalswift/bitcoin,sstone/bitcoin,EthanHeilman/bitcoin,domob1812/namecore,wellenreiter01/Feathercoin,gjhiggins/vcoincore,ajtowns/bitcoin,domob1812/bitcoin,practicalswift/bitcoin,GroestlCoin/GroestlCoin,cdecker/bitcoin,jnewbery/bitcoin,rnicoll/bitcoin,rnicoll/dogecoin,wellenreiter01/Feathercoin,JeremyRubin/bitcoin,MeshCollider/bitcoin,practicalswift/bitcoin,bitcoinsSG/bitcoin,droark/bitcoin,myriadteam/myriadcoin,AkioNak/bitcoin,andreaskern/bitcoin,qtumproject/qtum,pstratem/bitcoin,nikkitan/bitcoin,ajtowns/bitcoin,r8921039/bitcoin,mitchellcash/bitcoin,EthanHeilman/bitcoin,mruddy/bitcoin,prusnak/bitcoin,ajtowns/bitcoin,peercoin/peercoin,FeatherCoin/Feathercoin,bitcoinknots/bitcoin,tjps/bitcoin,tecnovert/particl-core,ahmedbodi/vertcoin,litecoin-project/litecoin,dscotese/bitcoin,Sjors/bitcoin,fujicoin/fujicoin,kallewoof/bitcoin,namecoin/namecoin-core,Sjors/bitcoin,droark/bitcoin,mm-s/bitcoin,GroestlCoin/GroestlCoin,jambolo/bitcoin,midnightmagic/bitcoin,sipsorcery/bitcoin,tecnovert/particl-core,particl/particl-core,peercoin/peercoin,jlopp/statoshi,namecoin/namecoin-core,Xekyo/bitcoin,tjps/bitcoin,tjps/bitcoin,ElementsProject/elements,fujicoin/fujicoin,jonasschnelli/bitcoin,alecalve/bitcoin,vertcoin/vertcoin,mm-s/bitcoin,tjps/bitcoin,qtumproject/qtum,CryptArc/bitcoin,JeremyRubin/bitcoin,nikkitan/bitcoin,DigitalPandacoin/pandacoin,apoelstra/bitcoin,CryptArc/bitcoin,r8921039/bitcoin,kallewoof/bitcoin,OmniLayer/omnicore,jnewbery/bitcoin,qtumproject/qtum,anditto/bitcoin,jtimon/bitcoin,ahmedbodi/vertcoin,bitcoinsSG/bitcoin,fujicoin/fujicoin,droark/bitcoin,GroestlCoin/bitcoin,bitcoin/bitcoin,namecoin/namecoin-core,bitcoinsSG/bitcoin,bitcoinsSG/bitcoin,bitcoinsSG/bitcoin,myriadcoin/myriadcoin,afk11/bitcoin,rnicoll/dogecoin,ahmedbodi/vertcoin,untrustbank/litecoin,achow101/bitcoin,practicalswift/bitcoin,yenliangl/bitcoin,monacoinproject/monacoin,midnightmagic/bitcoin,jlopp/statoshi,andreaskern/bitcoin,litecoin-project/litecoin,anditto/bitcoin,jlopp/statoshi,r8921039/bitcoin,particl/particl-core,bespike/litecoin,anditto/bitcoin,dscotese/bitcoin,fanquake/bitcoin,GroestlCoin/bitcoin,FeatherCoin/Feathercoin,lateminer/bitcoin,r8921039/bitcoin,practicalswift/bitcoin,sstone/bitcoin,instagibbs/bitcoin,ahmedbodi/vertcoin,sipsorcery/bitcoin,jambolo/bitcoin,achow101/bitcoin,MarcoFalke/bitcoin,bespike/litecoin,namecoin/namecoin-core,afk11/bitcoin,anditto/bitcoin,CryptArc/bitcoin,n1bor/bitcoin,achow101/bitcoin,midnightmagic/bitcoin,midnightmagic/bitcoin,qtumproject/qtum,mruddy/bitcoin,OmniLayer/omnicore,rnicoll/dogecoin,DigitalPandacoin/pandacoin,JeremyRubin/bitcoin,fanquake/bitcoin,namecoin/namecore,FeatherCoin/Feathercoin,domob1812/namecore,OmniLayer/omnicore,mm-s/bitcoin,rnicoll/bitcoin,jamesob/bitcoin,lateminer/bitcoin,JeremyRubin/bitcoin,myriadcoin/myriadcoin,rnicoll/bitcoin,sstone/bitcoin,tjps/bitcoin,FeatherCoin/Feathercoin,ajtowns/bitcoin,fanquake/bitcoin,EthanHeilman/bitcoin,namecoin/namecoin-core,GroestlCoin/bitcoin,prusnak/bitcoin,MarcoFalke/bitcoin,droark/bitcoin,GroestlCoin/bitcoin,nikkitan/bitcoin,alecalve/bitcoin,vertcoin/vertcoin,afk11/bitcoin,bespike/litecoin,rnicoll/bitcoin,DigitalPandacoin/pandacoin,jambolo/bitcoin,mitchellcash/bitcoin,AkioNak/bitcoin,jlopp/statoshi,sipsorcery/bitcoin,jamesob/bitcoin,monacoinproject/monacoin,gjhiggins/vcoincore,jtimon/bitcoin,monacoinproject/monacoin,cdecker/bitcoin,bitcoin/bitcoin,jonasschnelli/bitcoin,domob1812/bitcoin,untrustbank/litecoin,apoelstra/bitcoin,mitchellcash/bitcoin,kallewoof/bitcoin,jamesob/bitcoin,domob1812/namecore,n1bor/bitcoin,tjps/bitcoin,litecoin-project/litecoin,alecalve/bitcoin,prusnak/bitcoin,pataquets/namecoin-core,Sjors/bitcoin,untrustbank/litecoin,prusnak/bitcoin,vertcoin/vertcoin,midnightmagic/bitcoin,lateminer/bitcoin,sstone/bitcoin,vertcoin/vertcoin,myriadcoin/myriadcoin,MarcoFalke/bitcoin,domob1812/bitcoin,monacoinproject/monacoin,r8921039/bitcoin,myriadteam/myriadcoin,MarcoFalke/bitcoin,vertcoin/vertcoin,sipsorcery/bitcoin,GroestlCoin/bitcoin,jonasschnelli/bitcoin,afk11/bitcoin,mitchellcash/bitcoin,jtimon/bitcoin,achow101/bitcoin,namecoin/namecore,myriadcoin/myriadcoin,andreaskern/bitcoin,MeshCollider/bitcoin,ElementsProject/elements,pataquets/namecoin-core,untrustbank/litecoin,ElementsProject/elements,fujicoin/fujicoin,peercoin/peercoin,cdecker/bitcoin,AkioNak/bitcoin,GroestlCoin/GroestlCoin,OmniLayer/omnicore,afk11/bitcoin,andreaskern/bitcoin,anditto/bitcoin,ElementsProject/elements,JeremyRubin/bitcoin,jonasschnelli/bitcoin,mruddy/bitcoin,tecnovert/particl-core,pataquets/namecoin-core,AkioNak/bitcoin,yenliangl/bitcoin,Xekyo/bitcoin,ahmedbodi/vertcoin,jlopp/statoshi,cdecker/bitcoin,GroestlCoin/bitcoin,mm-s/bitcoin,sstone/bitcoin,prusnak/bitcoin,JeremyRubin/bitcoin,jtimon/bitcoin,apoelstra/bitcoin,apoelstra/bitcoin,DigitalPandacoin/pandacoin,bitcoinknots/bitcoin,wellenreiter01/Feathercoin,instagibbs/bitcoin,bitcoinknots/bitcoin,litecoin-project/litecoin,ahmedbodi/vertcoin,kallewoof/bitcoin,bespike/litecoin,mitchellcash/bitcoin,DigitalPandacoin/pandacoin,kallewoof/bitcoin,nikkitan/bitcoin,dscotese/bitcoin,bitcoin/bitcoin,peercoin/peercoin,mruddy/bitcoin,droark/bitcoin,ajtowns/bitcoin,n1bor/bitcoin,AkioNak/bitcoin,instagibbs/bitcoin,mruddy/bitcoin,jamesob/bitcoin,untrustbank/litecoin,bitcoin/bitcoin,rnicoll/dogecoin,domob1812/bitcoin,bitcoinsSG/bitcoin,apoelstra/bitcoin,peercoin/peercoin,myriadcoin/myriadcoin,MeshCollider/bitcoin,myriadteam/myriadcoin,ElementsProject/elements,cdecker/bitcoin,particl/particl-core,EthanHeilman/bitcoin,FeatherCoin/Feathercoin,myriadteam/myriadcoin,particl/particl-core,untrustbank/litecoin,alecalve/bitcoin,wellenreiter01/Feathercoin,domob1812/namecore,pstratem/bitcoin,jnewbery/bitcoin,namecoin/namecoin-core,fanquake/bitcoin,MeshCollider/bitcoin,GroestlCoin/GroestlCoin,pstratem/bitcoin,alecalve/bitcoin,peercoin/peercoin,fanquake/bitcoin,apoelstra/bitcoin,jlopp/statoshi,droark/bitcoin,andreaskern/bitcoin,myriadcoin/myriadcoin,MarcoFalke/bitcoin,anditto/bitcoin,ajtowns/bitcoin,particl/particl-core,CryptArc/bitcoin,gjhiggins/vcoincore,jnewbery/bitcoin,mruddy/bitcoin,midnightmagic/bitcoin,tecnovert/particl-core,jtimon/bitcoin,namecoin/namecore,fanquake/bitcoin,namecoin/namecore,bespike/litecoin,dscotese/bitcoin,lateminer/bitcoin,MarcoFalke/bitcoin,bitcoin/bitcoin,lateminer/bitcoin,bitcoinknots/bitcoin,jamesob/bitcoin