[test] Improve assert_raises_jsonrpc docstring
[test] Improve assert_raises_jsonrpc docstring

Github-Pull: #11125
Rebased-From: e1274947d4574bb83a020d0e178f0e5db7fc6282

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