Attempt to fix stopwatch test (#884)
Attempt to fix stopwatch test (#884)

* increase epsilon

* add wait before tests starts

fassadlr/StratisBitcoinFullNode,quantumagi/StratisBitcoinFullNode,Aprogiena/StratisBitcoinFullNode,Aprogiena/StratisBitcoinFullNode,Neurosploit/StratisBitcoinFullNode,stratisproject/StratisBitcoinFullNode,quantumagi/StratisBitcoinFullNode,Neurosploit/StratisBitcoinFullNode,mikedennis/StratisBitcoinFullNode,bokobza/StratisBitcoinFullNode,bokobza/StratisBitcoinFullNode,fassadlr/StratisBitcoinFullNode,Aprogiena/StratisBitcoinFullNode,stratisproject/StratisBitcoinFullNode,bokobza/StratisBitcoinFullNode,Neurosploit/StratisBitcoinFullNode,mikedennis/StratisBitcoinFullNode,mikedennis/StratisBitcoinFullNode,bokobza/StratisBitcoinFullNode,mikedennis/StratisBitcoinFullNode