test: Increase initial RPC timeout to 60 seconds
test: Increase initial RPC timeout to 60 seconds

When running the tests locally with a parallelism of 4 on an otherwise
busy system, RPC can take quite a wait to come up.

Change the timeout to 60 seconds just to be safe.

Github-Pull: #11091
Rebased-From: c1470a058f21bf98d83b9dc345c61626b87035cc

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