[tests] fixup dbcrash interaction with add_nodes()
[tests] fixup dbcrash interaction with add_nodes()

Github-Pull: #11230
Rebased-From: 8fdb6f9126fe1e13b60de11fd34c204247679ef4

Anfauglith/iop-hd,digibyte/digibyte,qtumproject/qtum,romanornr/viacoin,UFOCoins/ufo,particl/particl-core,BitzenyCoreDevelopers/bitzeny,wangxinxi/litecoin,GroestlCoin/GroestlCoin,romanornr/viacoin,qtumproject/qtum,BitzenyCoreDevelopers/bitzeny,GroestlCoin/bitcoin,gjhiggins/vcoincore,tecnovert/particl-core,romanornr/viacoin,UFOCoins/ufo,particl/particl-core,UFOCoins/ufo,Anfauglith/iop-hd,Jcing95/iop-hd,Jcing95/iop-hd,UFOCoins/ufo,digibyte/digibyte,Jcing95/iop-hd,gjhiggins/vcoincore,digibyte/digibyte,wangxinxi/litecoin,UFOCoins/ufo,digibyte/digibyte,tecnovert/particl-core,romanornr/viacoin,GroestlCoin/bitcoin,wangxinxi/litecoin,digibyte/digibyte,BitzenyCoreDevelopers/bitzeny,GroestlCoin/GroestlCoin,GroestlCoin/bitcoin,BitzenyCoreDevelopers/bitzeny,digibyte/digibyte,gjhiggins/vcoincore,GroestlCoin/bitcoin,romanornr/viacoin,wangxinxi/litecoin,tecnovert/particl-core,qtumproject/qtum,Anfauglith/iop-hd,particl/particl-core,Anfauglith/iop-hd,qtumproject/qtum,gjhiggins/vcoincore,gjhiggins/vcoincore,particl/particl-core,GroestlCoin/GroestlCoin,GroestlCoin/GroestlCoin,romanornr/viacoin,Jcing95/iop-hd,tecnovert/particl-core,particl/particl-core,BitzenyCoreDevelopers/bitzeny,wangxinxi/litecoin,gjhiggins/vcoincore,wangxinxi/litecoin,qtumproject/qtum,UFOCoins/ufo,Anfauglith/iop-hd,Anfauglith/iop-hd,GroestlCoin/GroestlCoin,qtumproject/qtum,GroestlCoin/bitcoin,tecnovert/particl-core,Jcing95/iop-hd,particl/particl-core,BitzenyCoreDevelopers/bitzeny,qtumproject/qtum,Jcing95/iop-hd,GroestlCoin/GroestlCoin,tecnovert/particl-core,GroestlCoin/bitcoin