splitting out some csv parsing functions

splitting out some csv parsing functions

fixing env suit half fat test (fewer output files now we have switched to using the mean of daily max as standard for env suit)

adding a check for loading resource files before all partial integration tests begin. Allows the user to spot if they have not set their working dir correctly

moving the class setup function to half-fat tests, so the TEST_OUT variable is reset for the half-fat tests but not the full-fat ones when being loaded by unittest.main

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

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