test: validation: add unittest for UpdateTip behavior
test: validation: add unittest for UpdateTip behavior

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