Remove DataExportControllerTests

No such method: DataExportControllerTests::getJobs()
Fix PluginControllerTests
Merge pull request #12 from thehyve/tests_fixes

Tests fixes - integration test are 'corrected' to not run when the appropriate test data is not present; these still need to be fixed; see JIRA items TMPSTGSQL-60 and TMPSTGSQL-63