Revert "tests: Support calling add_nodes more than once"
Revert "tests: Support calling add_nodes more than once"

This reverts commit 98a1846b00d9c3076d6dcd96244fae6f923e26a0.

rnicoll/dogecoin,vertcoin/vertcoin,wellenreiter01/Feathercoin,instagibbs/bitcoin,gjhiggins/vcoincore,prusnak/bitcoin,jamesob/bitcoin,ahmedbodi/vertcoin,dscotese/bitcoin,gjhiggins/vcoincore,EthanHeilman/bitcoin,apoelstra/bitcoin,apoelstra/bitcoin,DigitalPandacoin/pandacoin,instagibbs/bitcoin,GroestlCoin/bitcoin,GroestlCoin/GroestlCoin,alecalve/bitcoin,OmniLayer/omnicore,wellenreiter01/Feathercoin,GroestlCoin/bitcoin,mruddy/bitcoin,tjps/bitcoin,domob1812/namecore,jlopp/statoshi,mm-s/bitcoin,litecoin-project/litecoin,GroestlCoin/bitcoin,GroestlCoin/GroestlCoin,JeremyRubin/bitcoin,mruddy/bitcoin,litecoin-project/litecoin,r8921039/bitcoin,sipsorcery/bitcoin,jnewbery/bitcoin,tjps/bitcoin,JeremyRubin/bitcoin,alecalve/bitcoin,practicalswift/bitcoin,tjps/bitcoin,sipsorcery/bitcoin,r8921039/bitcoin,AkioNak/bitcoin,jtimon/bitcoin,wellenreiter01/Feathercoin,myriadcoin/myriadcoin,afk11/bitcoin,sstone/bitcoin,EthanHeilman/bitcoin,pataquets/namecoin-core,FeatherCoin/Feathercoin,untrustbank/litecoin,namecoin/namecoin-core,Sjors/bitcoin,droark/bitcoin,OmniLayer/omnicore,Sjors/bitcoin,ElementsProject/elements,rnicoll/bitcoin,MeshCollider/bitcoin,bitcoinknots/bitcoin,untrustbank/litecoin,domob1812/namecore,jonasschnelli/bitcoin,tecnovert/particl-core,afk11/bitcoin,MarcoFalke/bitcoin,kallewoof/bitcoin,mm-s/bitcoin,afk11/bitcoin,jamesob/bitcoin,yenliangl/bitcoin,jtimon/bitcoin,Xekyo/bitcoin,apoelstra/bitcoin,monacoinproject/monacoin,sstone/bitcoin,ElementsProject/elements,domob1812/bitcoin,tjps/bitcoin,lateminer/bitcoin,rnicoll/dogecoin,myriadteam/myriadcoin,particl/particl-core,ElementsProject/elements,qtumproject/qtum,alecalve/bitcoin,EthanHeilman/bitcoin,jambolo/bitcoin,ajtowns/bitcoin,achow101/bitcoin,myriadteam/myriadcoin,domob1812/bitcoin,OmniLayer/omnicore,sstone/bitcoin,achow101/bitcoin,ahmedbodi/vertcoin,domob1812/namecore,mitchellcash/bitcoin,MeshCollider/bitcoin,tecnovert/particl-core,sipsorcery/bitcoin,peercoin/peercoin,ElementsProject/elements,fujicoin/fujicoin,mruddy/bitcoin,rnicoll/dogecoin,qtumproject/qtum,wellenreiter01/Feathercoin,midnightmagic/bitcoin,ajtowns/bitcoin,bitcoinsSG/bitcoin,domob1812/bitcoin,nikkitan/bitcoin,EthanHeilman/bitcoin,AkioNak/bitcoin,particl/particl-core,jonasschnelli/bitcoin,untrustbank/litecoin,anditto/bitcoin,myriadcoin/myriadcoin,tecnovert/particl-core,DigitalPandacoin/pandacoin,domob1812/namecore,litecoin-project/litecoin,andreaskern/bitcoin,andreaskern/bitcoin,DigitalPandacoin/pandacoin,monacoinproject/monacoin,midnightmagic/bitcoin,pstratem/bitcoin,mruddy/bitcoin,instagibbs/bitcoin,peercoin/peercoin,bitcoinsSG/bitcoin,litecoin-project/litecoin,monacoinproject/monacoin,kallewoof/bitcoin,namecoin/namecore,FeatherCoin/Feathercoin,bespike/litecoin,myriadcoin/myriadcoin,cdecker/bitcoin,anditto/bitcoin,droark/bitcoin,sipsorcery/bitcoin,kallewoof/bitcoin,prusnak/bitcoin,ahmedbodi/vertcoin,bespike/litecoin,Xekyo/bitcoin,r8921039/bitcoin,CryptArc/bitcoin,cdecker/bitcoin,pataquets/namecoin-core,Xekyo/bitcoin,yenliangl/bitcoin,CryptArc/bitcoin,myriadcoin/myriadcoin,CryptArc/bitcoin,afk11/bitcoin,jambolo/bitcoin,namecoin/namecore,mm-s/bitcoin,jamesob/bitcoin,jonasschnelli/bitcoin,achow101/bitcoin,domob1812/namecore,achow101/bitcoin,MarcoFalke/bitcoin,vertcoin/vertcoin,vertcoin/vertcoin,Sjors/bitcoin,dscotese/bitcoin,fanquake/bitcoin,ajtowns/bitcoin,MarcoFalke/bitcoin,particl/particl-core,JeremyRubin/bitcoin,qtumproject/qtum,dscotese/bitcoin,MarcoFalke/bitcoin,fanquake/bitcoin,mitchellcash/bitcoin,kallewoof/bitcoin,jamesob/bitcoin,OmniLayer/omnicore,pstratem/bitcoin,AkioNak/bitcoin,rnicoll/bitcoin,bespike/litecoin,bespike/litecoin,anditto/bitcoin,jambolo/bitcoin,mm-s/bitcoin,pstratem/bitcoin,jnewbery/bitcoin,sstone/bitcoin,jambolo/bitcoin,prusnak/bitcoin,myriadteam/myriadcoin,peercoin/peercoin,jlopp/statoshi,bespike/litecoin,namecoin/namecoin-core,mruddy/bitcoin,midnightmagic/bitcoin,rnicoll/dogecoin,gjhiggins/vcoincore,fanquake/bitcoin,FeatherCoin/Feathercoin,myriadteam/myriadcoin,alecalve/bitcoin,MeshCollider/bitcoin,r8921039/bitcoin,domob1812/bitcoin,jlopp/statoshi,prusnak/bitcoin,yenliangl/bitcoin,MeshCollider/bitcoin,CryptArc/bitcoin,n1bor/bitcoin,jnewbery/bitcoin,vertcoin/vertcoin,untrustbank/litecoin,peercoin/peercoin,rnicoll/bitcoin,ahmedbodi/vertcoin,bitcoin/bitcoin,practicalswift/bitcoin,OmniLayer/omnicore,monacoinproject/monacoin,apoelstra/bitcoin,fanquake/bitcoin,ajtowns/bitcoin,namecoin/namecore,qtumproject/qtum,sstone/bitcoin,domob1812/namecore,bitcoinsSG/bitcoin,AkioNak/bitcoin,bitcoin/bitcoin,jlopp/statoshi,ajtowns/bitcoin,lateminer/bitcoin,n1bor/bitcoin,practicalswift/bitcoin,EthanHeilman/bitcoin,gjhiggins/vcoincore,r8921039/bitcoin,nikkitan/bitcoin,MarcoFalke/bitcoin,mitchellcash/bitcoin,mm-s/bitcoin,Xekyo/bitcoin,qtumproject/qtum,AkioNak/bitcoin,untrustbank/litecoin,droark/bitcoin,midnightmagic/bitcoin,jnewbery/bitcoin,JeremyRubin/bitcoin,tecnovert/particl-core,apoelstra/bitcoin,CryptArc/bitcoin,dscotese/bitcoin,domob1812/bitcoin,ahmedbodi/vertcoin,ElementsProject/elements,pataquets/namecoin-core,JeremyRubin/bitcoin,qtumproject/qtum,jlopp/statoshi,jnewbery/bitcoin,cdecker/bitcoin,namecoin/namecoin-core,bitcoin/bitcoin,gjhiggins/vcoincore,dscotese/bitcoin,namecoin/namecoin-core,instagibbs/bitcoin,qtumproject/qtum,yenliangl/bitcoin,fujicoin/fujicoin,FeatherCoin/Feathercoin,rnicoll/bitcoin,kallewoof/bitcoin,andreaskern/bitcoin,n1bor/bitcoin,bitcoinsSG/bitcoin,tjps/bitcoin,OmniLayer/omnicore,nikkitan/bitcoin,kallewoof/bitcoin,rnicoll/bitcoin,bespike/litecoin,bitcoinknots/bitcoin,sstone/bitcoin,Xekyo/bitcoin,anditto/bitcoin,achow101/bitcoin,jamesob/bitcoin,pstratem/bitcoin,peercoin/peercoin,n1bor/bitcoin,droark/bitcoin,myriadcoin/myriadcoin,CryptArc/bitcoin,FeatherCoin/Feathercoin,tjps/bitcoin,namecoin/namecore,jtimon/bitcoin,instagibbs/bitcoin,sipsorcery/bitcoin,GroestlCoin/bitcoin,sipsorcery/bitcoin,ahmedbodi/vertcoin,andreaskern/bitcoin,vertcoin/vertcoin,alecalve/bitcoin,tecnovert/particl-core,jambolo/bitcoin,anditto/bitcoin,jtimon/bitcoin,bitcoinknots/bitcoin,pstratem/bitcoin,tecnovert/particl-core,monacoinproject/monacoin,GroestlCoin/bitcoin,MarcoFalke/bitcoin,bitcoin/bitcoin,apoelstra/bitcoin,mitchellcash/bitcoin,lateminer/bitcoin,mruddy/bitcoin,alecalve/bitcoin,practicalswift/bitcoin,jtimon/bitcoin,cdecker/bitcoin,andreaskern/bitcoin,afk11/bitcoin,jlopp/statoshi,afk11/bitcoin,prusnak/bitcoin,namecoin/namecore,nikkitan/bitcoin,namecoin/namecore,yenliangl/bitcoin,EthanHeilman/bitcoin,jtimon/bitcoin,cdecker/bitcoin,DigitalPandacoin/pandacoin,prusnak/bitcoin,Xekyo/bitcoin,dscotese/bitcoin,lateminer/bitcoin,fujicoin/fujicoin,particl/particl-core,bitcoinsSG/bitcoin,AkioNak/bitcoin,instagibbs/bitcoin,pataquets/namecoin-core,pstratem/bitcoin,bitcoinknots/bitcoin,domob1812/bitcoin,mitchellcash/bitcoin,particl/particl-core,bitcoinknots/bitcoin,anditto/bitcoin,monacoinproject/monacoin,Sjors/bitcoin,ajtowns/bitcoin,myriadteam/myriadcoin,cdecker/bitcoin,GroestlCoin/GroestlCoin,pataquets/namecoin-core,GroestlCoin/GroestlCoin,DigitalPandacoin/pandacoin,pataquets/namecoin-core,nikkitan/bitcoin,midnightmagic/bitcoin,r8921039/bitcoin,droark/bitcoin,bitcoin/bitcoin,droark/bitcoin,GroestlCoin/GroestlCoin,fanquake/bitcoin,namecoin/namecoin-core,litecoin-project/litecoin,practicalswift/bitcoin,nikkitan/bitcoin,mm-s/bitcoin,untrustbank/litecoin,ElementsProject/elements,rnicoll/dogecoin,MeshCollider/bitcoin,MeshCollider/bitcoin,midnightmagic/bitcoin,myriadteam/myriadcoin,gjhiggins/vcoincore,DigitalPandacoin/pandacoin,Sjors/bitcoin,lateminer/bitcoin,namecoin/namecoin-core,FeatherCoin/Feathercoin,particl/particl-core,practicalswift/bitcoin,bitcoin/bitcoin,jonasschnelli/bitcoin,jamesob/bitcoin,yenliangl/bitcoin,GroestlCoin/bitcoin,fujicoin/fujicoin,myriadcoin/myriadcoin,lateminer/bitcoin,peercoin/peercoin,fanquake/bitcoin,achow101/bitcoin,GroestlCoin/GroestlCoin,wellenreiter01/Feathercoin,n1bor/bitcoin,JeremyRubin/bitcoin,vertcoin/vertcoin,andreaskern/bitcoin,jambolo/bitcoin,bitcoinsSG/bitcoin,fujicoin/fujicoin,n1bor/bitcoin,mitchellcash/bitcoin,rnicoll/bitcoin,jonasschnelli/bitcoin,litecoin-project/litecoin,fujicoin/fujicoin,wellenreiter01/Feathercoin