added additional security to get_definition tests
added additional security to get_definition tests

tjwei/jedi,tjwei/jedi,flurischt/jedi,WoLpH/jedi,flurischt/jedi,dwillmer/jedi,mfussenegger/jedi,WoLpH/jedi,dwillmer/jedi,mfussenegger/jedi,jonashaag/jedi,jonashaag/jedi