changing tests to check for success via the TestResult object and changing the exit code - previously failing tests were not  being picked up by the gitlab runner

reseting the IntegrationTestUtils.TEST_OUT_PATH variable upon loading each test class, was having its value carried across from previous test runs when being run as past of a test suite

chore: Tidy imports

restoring the original sys.exit to ProcessorUtils, dealing with exit commands in the unit tests by catching them