allow ToolStore to find tools that have "ToolSvc." prefix
Since the AnaToolHandle creates tools with that prefix I now made sure that even if users don't specify that prefix the ToolStore can still find it if the tool has the prefix in the name.
Since I was anyways touching the unit test I switched the existing test over to googletest.
This should address: https://its.cern.ch/jira/browse/ATLASG-1486