splitting out some csv parsing functions

...in recent commits to ews-coordinator and ews-epidemiology.

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

making survey tests use the same structure as others, with separated test suits for full and partial tests