tests: clean up versionbits test
tests: clean up versionbits test

Simplify the versionbits unit test slightly to make the next set of
changes a little easier to follow.

GroestlCoin/bitcoin,sstone/bitcoin,sstone/bitcoin,jambolo/bitcoin,prusnak/bitcoin,apoelstra/bitcoin,jambolo/bitcoin,sipsorcery/bitcoin,jamesob/bitcoin,ajtowns/bitcoin,lateminer/bitcoin,MarcoFalke/bitcoin,jamesob/bitcoin,MarcoFalke/bitcoin,jlopp/statoshi,jambolo/bitcoin,rnicoll/bitcoin,namecoin/namecoin-core,domob1812/namecore,pataquets/namecoin-core,GroestlCoin/GroestlCoin,achow101/bitcoin,sstone/bitcoin,namecoin/namecore,fujicoin/fujicoin,bitcoin/bitcoin,anditto/bitcoin,mruddy/bitcoin,mm-s/bitcoin,instagibbs/bitcoin,bitcoinsSG/bitcoin,mruddy/bitcoin,bitcoinsSG/bitcoin,domob1812/bitcoin,yenliangl/bitcoin,apoelstra/bitcoin,kallewoof/bitcoin,AkioNak/bitcoin,apoelstra/bitcoin,tecnovert/particl-core,AkioNak/bitcoin,prusnak/bitcoin,jambolo/bitcoin,yenliangl/bitcoin,fanquake/bitcoin,achow101/bitcoin,domob1812/bitcoin,qtumproject/qtum,bitcoinsSG/bitcoin,namecoin/namecoin-core,prusnak/bitcoin,kallewoof/bitcoin,jlopp/statoshi,bitcoinsSG/bitcoin,dscotese/bitcoin,particl/particl-core,prusnak/bitcoin,fanquake/bitcoin,jambolo/bitcoin,jamesob/bitcoin,rnicoll/bitcoin,MarcoFalke/bitcoin,andreaskern/bitcoin,fujicoin/fujicoin,pataquets/namecoin-core,JeremyRubin/bitcoin,rnicoll/bitcoin,yenliangl/bitcoin,lateminer/bitcoin,namecoin/namecore,jamesob/bitcoin,mm-s/bitcoin,namecoin/namecoin-core,andreaskern/bitcoin,bitcoinknots/bitcoin,sipsorcery/bitcoin,AkioNak/bitcoin,bitcoin/bitcoin,GroestlCoin/bitcoin,domob1812/bitcoin,MarcoFalke/bitcoin,particl/particl-core,ajtowns/bitcoin,sipsorcery/bitcoin,bitcoinknots/bitcoin,fujicoin/fujicoin,qtumproject/qtum,bitcoinknots/bitcoin,jamesob/bitcoin,yenliangl/bitcoin,yenliangl/bitcoin,pataquets/namecoin-core,qtumproject/qtum,lateminer/bitcoin,ElementsProject/elements,namecoin/namecore,apoelstra/bitcoin,AkioNak/bitcoin,jambolo/bitcoin,bitcoinknots/bitcoin,dscotese/bitcoin,kallewoof/bitcoin,GroestlCoin/bitcoin,namecoin/namecoin-core,AkioNak/bitcoin,ajtowns/bitcoin,Xekyo/bitcoin,tecnovert/particl-core,jlopp/statoshi,jlopp/statoshi,domob1812/bitcoin,dscotese/bitcoin,apoelstra/bitcoin,Xekyo/bitcoin,fujicoin/fujicoin,mm-s/bitcoin,pataquets/namecoin-core,yenliangl/bitcoin,MarcoFalke/bitcoin,bitcoin/bitcoin,prusnak/bitcoin,anditto/bitcoin,achow101/bitcoin,namecoin/namecore,rnicoll/bitcoin,bitcoinsSG/bitcoin,GroestlCoin/GroestlCoin,dscotese/bitcoin,andreaskern/bitcoin,qtumproject/qtum,sipsorcery/bitcoin,fujicoin/fujicoin,JeremyRubin/bitcoin,qtumproject/qtum,pataquets/namecoin-core,mm-s/bitcoin,namecoin/namecore,instagibbs/bitcoin,Xekyo/bitcoin,fanquake/bitcoin,GroestlCoin/bitcoin,JeremyRubin/bitcoin,GroestlCoin/bitcoin,instagibbs/bitcoin,AkioNak/bitcoin,tecnovert/particl-core,bitcoinknots/bitcoin,namecoin/namecoin-core,mm-s/bitcoin,tecnovert/particl-core,prusnak/bitcoin,domob1812/namecore,fanquake/bitcoin,dscotese/bitcoin,fanquake/bitcoin,ElementsProject/elements,MarcoFalke/bitcoin,andreaskern/bitcoin,bitcoin/bitcoin,qtumproject/qtum,tecnovert/particl-core,GroestlCoin/GroestlCoin,JeremyRubin/bitcoin,Xekyo/bitcoin,andreaskern/bitcoin,jlopp/statoshi,domob1812/bitcoin,pataquets/namecoin-core,lateminer/bitcoin,ajtowns/bitcoin,jlopp/statoshi,particl/particl-core,bitcoinsSG/bitcoin,rnicoll/bitcoin,fujicoin/fujicoin,achow101/bitcoin,andreaskern/bitcoin,JeremyRubin/bitcoin,GroestlCoin/GroestlCoin,mruddy/bitcoin,ajtowns/bitcoin,JeremyRubin/bitcoin,sipsorcery/bitcoin,instagibbs/bitcoin,instagibbs/bitcoin,tecnovert/particl-core,Xekyo/bitcoin,namecoin/namecoin-core,sstone/bitcoin,anditto/bitcoin,fanquake/bitcoin,bitcoin/bitcoin,sipsorcery/bitcoin,mruddy/bitcoin,qtumproject/qtum,achow101/bitcoin,GroestlCoin/GroestlCoin,ajtowns/bitcoin,kallewoof/bitcoin,achow101/bitcoin,ElementsProject/elements,bitcoin/bitcoin,jamesob/bitcoin,sstone/bitcoin,particl/particl-core,GroestlCoin/bitcoin,instagibbs/bitcoin,particl/particl-core,anditto/bitcoin,ElementsProject/elements,particl/particl-core,lateminer/bitcoin,domob1812/bitcoin,mm-s/bitcoin,mruddy/bitcoin,kallewoof/bitcoin,domob1812/namecore,GroestlCoin/GroestlCoin,mruddy/bitcoin,dscotese/bitcoin,anditto/bitcoin,domob1812/namecore,domob1812/namecore,rnicoll/bitcoin,Xekyo/bitcoin,ElementsProject/elements,kallewoof/bitcoin,sstone/bitcoin,apoelstra/bitcoin,domob1812/namecore,ElementsProject/elements,namecoin/namecore,lateminer/bitcoin,anditto/bitcoin