test: Default blockversion to 4 in feature_block
test: Default blockversion to 4 in feature_block

There is one tests that checks version=1 blocks are rejected. For all
other tests the version doesn't matter as long as it is large enough.

domob1812/namecore,domob1812/namecore,jamesob/bitcoin,tecnovert/particl-core,domob1812/namecore,jambolo/bitcoin,bitcoin/bitcoin,achow101/bitcoin,EthanHeilman/bitcoin,rnicoll/dogecoin,yenliangl/bitcoin,anditto/bitcoin,namecoin/namecore,yenliangl/bitcoin,prusnak/bitcoin,jonasschnelli/bitcoin,particl/particl-core,mruddy/bitcoin,JeremyRubin/bitcoin,ajtowns/bitcoin,andreaskern/bitcoin,fujicoin/fujicoin,andreaskern/bitcoin,n1bor/bitcoin,EthanHeilman/bitcoin,dscotese/bitcoin,cdecker/bitcoin,prusnak/bitcoin,andreaskern/bitcoin,Sjors/bitcoin,lateminer/bitcoin,MarcoFalke/bitcoin,rnicoll/bitcoin,achow101/bitcoin,litecoin-project/litecoin,domob1812/bitcoin,GroestlCoin/GroestlCoin,namecoin/namecore,achow101/bitcoin,ElementsProject/elements,prusnak/bitcoin,yenliangl/bitcoin,jlopp/statoshi,yenliangl/bitcoin,EthanHeilman/bitcoin,sipsorcery/bitcoin,namecoin/namecore,domob1812/namecore,rnicoll/bitcoin,Sjors/bitcoin,mruddy/bitcoin,fujicoin/fujicoin,n1bor/bitcoin,sstone/bitcoin,rnicoll/dogecoin,jambolo/bitcoin,Xekyo/bitcoin,mruddy/bitcoin,MeshCollider/bitcoin,ElementsProject/elements,mm-s/bitcoin,cdecker/bitcoin,Xekyo/bitcoin,EthanHeilman/bitcoin,sipsorcery/bitcoin,particl/particl-core,bitcoinsSG/bitcoin,particl/particl-core,alecalve/bitcoin,Xekyo/bitcoin,qtumproject/qtum,rnicoll/dogecoin,pstratem/bitcoin,andreaskern/bitcoin,prusnak/bitcoin,bitcoinknots/bitcoin,jambolo/bitcoin,jamesob/bitcoin,qtumproject/qtum,ajtowns/bitcoin,sstone/bitcoin,sipsorcery/bitcoin,anditto/bitcoin,rnicoll/bitcoin,practicalswift/bitcoin,lateminer/bitcoin,jnewbery/bitcoin,namecoin/namecoin-core,domob1812/bitcoin,domob1812/bitcoin,AkioNak/bitcoin,qtumproject/qtum,ElementsProject/elements,namecoin/namecoin-core,namecoin/namecoin-core,EthanHeilman/bitcoin,apoelstra/bitcoin,fujicoin/fujicoin,anditto/bitcoin,bitcoinsSG/bitcoin,jnewbery/bitcoin,GroestlCoin/GroestlCoin,JeremyRubin/bitcoin,practicalswift/bitcoin,pataquets/namecoin-core,kallewoof/bitcoin,jamesob/bitcoin,kallewoof/bitcoin,domob1812/bitcoin,achow101/bitcoin,cdecker/bitcoin,EthanHeilman/bitcoin,mruddy/bitcoin,GroestlCoin/bitcoin,bitcoinsSG/bitcoin,prusnak/bitcoin,bitcoinknots/bitcoin,bitcoinsSG/bitcoin,n1bor/bitcoin,fujicoin/fujicoin,mm-s/bitcoin,andreaskern/bitcoin,mm-s/bitcoin,lateminer/bitcoin,qtumproject/qtum,ElementsProject/elements,jonasschnelli/bitcoin,pataquets/namecoin-core,apoelstra/bitcoin,namecoin/namecoin-core,dscotese/bitcoin,dscotese/bitcoin,dscotese/bitcoin,practicalswift/bitcoin,Sjors/bitcoin,n1bor/bitcoin,jambolo/bitcoin,andreaskern/bitcoin,tecnovert/particl-core,pataquets/namecoin-core,jlopp/statoshi,GroestlCoin/GroestlCoin,sstone/bitcoin,ajtowns/bitcoin,AkioNak/bitcoin,apoelstra/bitcoin,domob1812/namecore,tecnovert/particl-core,bitcoin/bitcoin,particl/particl-core,fujicoin/fujicoin,mm-s/bitcoin,alecalve/bitcoin,instagibbs/bitcoin,domob1812/bitcoin,AkioNak/bitcoin,kallewoof/bitcoin,mruddy/bitcoin,sstone/bitcoin,GroestlCoin/bitcoin,tecnovert/particl-core,bitcoinsSG/bitcoin,tecnovert/particl-core,GroestlCoin/bitcoin,practicalswift/bitcoin,bitcoin/bitcoin,domob1812/namecore,Xekyo/bitcoin,bitcoin/bitcoin,fanquake/bitcoin,fanquake/bitcoin,anditto/bitcoin,JeremyRubin/bitcoin,ElementsProject/elements,bitcoinknots/bitcoin,pataquets/namecoin-core,rnicoll/dogecoin,dscotese/bitcoin,fanquake/bitcoin,yenliangl/bitcoin,pstratem/bitcoin,apoelstra/bitcoin,fujicoin/fujicoin,pstratem/bitcoin,MarcoFalke/bitcoin,lateminer/bitcoin,bitcoin/bitcoin,AkioNak/bitcoin,Sjors/bitcoin,litecoin-project/litecoin,jlopp/statoshi,litecoin-project/litecoin,lateminer/bitcoin,cdecker/bitcoin,namecoin/namecore,Xekyo/bitcoin,sipsorcery/bitcoin,MarcoFalke/bitcoin,jambolo/bitcoin,rnicoll/bitcoin,GroestlCoin/GroestlCoin,jlopp/statoshi,AkioNak/bitcoin,bitcoinknots/bitcoin,achow101/bitcoin,litecoin-project/litecoin,instagibbs/bitcoin,rnicoll/bitcoin,jlopp/statoshi,namecoin/namecore,JeremyRubin/bitcoin,practicalswift/bitcoin,Xekyo/bitcoin,domob1812/bitcoin,MeshCollider/bitcoin,instagibbs/bitcoin,mruddy/bitcoin,alecalve/bitcoin,MeshCollider/bitcoin,jamesob/bitcoin,fanquake/bitcoin,lateminer/bitcoin,particl/particl-core,alecalve/bitcoin,Sjors/bitcoin,apoelstra/bitcoin,achow101/bitcoin,bitcoinknots/bitcoin,cdecker/bitcoin,fanquake/bitcoin,apoelstra/bitcoin,ajtowns/bitcoin,JeremyRubin/bitcoin,jonasschnelli/bitcoin,bitcoin/bitcoin,qtumproject/qtum,kallewoof/bitcoin,cdecker/bitcoin,rnicoll/dogecoin,sipsorcery/bitcoin,n1bor/bitcoin,fanquake/bitcoin,AkioNak/bitcoin,qtumproject/qtum,GroestlCoin/bitcoin,namecoin/namecoin-core,sstone/bitcoin,yenliangl/bitcoin,MarcoFalke/bitcoin,bitcoinsSG/bitcoin,sstone/bitcoin,pstratem/bitcoin,GroestlCoin/GroestlCoin,jonasschnelli/bitcoin,instagibbs/bitcoin,anditto/bitcoin,MarcoFalke/bitcoin,jlopp/statoshi,jambolo/bitcoin,instagibbs/bitcoin,MarcoFalke/bitcoin,jamesob/bitcoin,pataquets/namecoin-core,jnewbery/bitcoin,namecoin/namecore,jamesob/bitcoin,jnewbery/bitcoin,pstratem/bitcoin,GroestlCoin/bitcoin,alecalve/bitcoin,mm-s/bitcoin,kallewoof/bitcoin,MeshCollider/bitcoin,jonasschnelli/bitcoin,GroestlCoin/bitcoin,tecnovert/particl-core,dscotese/bitcoin,MeshCollider/bitcoin,sipsorcery/bitcoin,ajtowns/bitcoin,JeremyRubin/bitcoin,jnewbery/bitcoin,litecoin-project/litecoin,pataquets/namecoin-core,alecalve/bitcoin,anditto/bitcoin,MeshCollider/bitcoin,GroestlCoin/GroestlCoin,instagibbs/bitcoin,particl/particl-core,mm-s/bitcoin,prusnak/bitcoin,practicalswift/bitcoin,namecoin/namecoin-core,ajtowns/bitcoin,qtumproject/qtum,pstratem/bitcoin,ElementsProject/elements,rnicoll/bitcoin,kallewoof/bitcoin,litecoin-project/litecoin,n1bor/bitcoin