SP-1060, SWE-36: ArtifactRepository: print statements added. Basic framework defined.

integration-tests/settings.py

integration-tests/source/systemtest/artifactrepository.py

integration-tests/source/systemtest/testcase.py

integration-tests/source/systemtest/util.py

integration-tests/sourceTest/systemtest/__init__.py

...on-tests/sourceTest/systemtest/artifactrepository_test.py

integration-tests/sourceTest/systemtest/testcasewithfiles.py

integration-tests/sourceTest/systemtest/util_test.py

integration-tests/test.py

integration-tests/test_screening.py

integration-tests/test_yeastx.py