Travis: Initiating build for commit '7c553850d2cae3f5ec594ecb6d051b428d4b88ae' on branch 'master': Refs #5800, add namespaces to integration tests in root folder. Also add IntegrationTestCase to a namespace, re-add individual test @groups, move test groups to class level, and rename test files & class names so underscores are not used.