Adding RPC tests for the following wallet related calls: getbalance,
listsinceblock, listtransactions, listlockunspent, listaccounts
listaddressgroupings
Merge pull request #5530

7c5dd60 Adding RPC tests for the following wallet related calls: getbalance, listsinceblock, listtransactions, listlockunspent, listaccounts listaddressgroupings (Everett Forth)