Add IMConfig.validate() with 'name' property check
Move catch_err util out of AppTester checking tasks test module and into test_utils module
Add name config property to the simple config fixture
Get AppTester working with the new 'name' config property
Change the toolkit to use the config name property as the default for namespacing users and metrics
Merge branch 'develop' into feature/issue-65-add-an-app-name-config-property-to-use-as-a-default-when-namespacing-stored-things
Merge branch 'feature/issue-65-add-an-app-name-config-property-to-use-as-a-default-when-namespacing-stored-things' into develop