Add pytest setup for each package

.gitlab-ci.yml

gstlal-burst/pytest.ini

gstlal-burst/tests/tests_pytest/peak_test_01a_control.dump

gstlal-burst/tests/tests_pytest/test_trigger_01.py

gstlal-burst/tests/tests_pytest/utils/common.py

gstlal-calibration/pytest.ini

gstlal-calibration/tests/tests_pytest/test_pyfilter.py

gstlal-calibration/tests/tests_pytest/utils/__init__.py

gstlal-calibration/tests/tests_pytest/utils/common.py

gstlal-inspiral/pytest.ini

gstlal-inspiral/tests/tests_pytest/itac_test_01.py

gstlal-inspiral/tests/tests_pytest/utils/common.py

gstlal-ugly/pytest.ini

gstlal-ugly/tests/tests_pytest/test_ratefaker.py

gstlal-ugly/tests/tests_pytest/utils/common.py

gstlal/python/utilities/Makefile.am

gstlal/python/utilities/testtools.py

gstlal/tests/tests_pytest/test_datasource.py