Several changes to the CI/testing

1) Rename all tests to the pytest standard naming convention
2) Update to use pytest to run the tests and collect coverage
3) Simplify gitlab CI script using above changes

.coveragerc

+[run]
+omit =
+    test/example_test.py
+    test/gw_example_test.py
+    test/noise_realisation_test.py
+    test/other_test.py

.gitlab-ci.yml

@@ -21,11 +21,11 @@ python-2:
     - apt install -y libgl1-mesa-glx
     - pip install -r requirements.txt
     - pip install -r optional_requirements.txt
-    - pip install lalsuite enum gwpy
+    - pip install enum
   script:
     - python setup.py install
     # Run tests without finding coverage
-    - for test in test/*tests.py; do python $test; done
+    - pytest
 
 # test example on python 3
 python-3:
@@ -39,6 +39,7 @@ python-3:
     - pip install 'coverage>=4.5'
     - pip install coverage-badge
     - pip install flake8
+    - pip install pytest-cov
   script:
     - python setup.py install
 
@@ -46,23 +47,9 @@ python-3:
     - flake8 .
 
     # Run tests and collect coverage data
-    - coverage --version
-    - coverage erase
-    - coverage run --debug=trace --include=/opt/conda/lib/python3.6/site-packages/tupak* -a test/conversion_tests.py
-    - coverage run --include=/opt/conda/lib/python3.6/site-packages/tupak* -a test/calibration_tests.py
-    - coverage run --include=/opt/conda/lib/python3.6/site-packages/tupak* -a test/detector_tests.py
-    - coverage run --include=/opt/conda/lib/python3.6/site-packages/tupak* -a test/gw_likelihood_tests.py
-    - coverage run --include=/opt/conda/lib/python3.6/site-packages/tupak* -a test/likelihood_tests.py
-    - coverage run --include=/opt/conda/lib/python3.6/site-packages/tupak* -a test/prior_tests.py
-    - coverage run --include=/opt/conda/lib/python3.6/site-packages/tupak* -a test/sampler_tests.py
-    - coverage run --include=/opt/conda/lib/python3.6/site-packages/tupak* -a test/utils_tests.py
-    - coverage run --include=/opt/conda/lib/python3.6/site-packages/tupak* -a test/waveform_generator_tests.py
+    - pytest --cov=tupak
     - coverage html
     - coverage-badge -o coverage_badge.svg -f
-    # Run all other tests (no coverage data collected)
-    - python test/example_tests.py
-    - python test/gw_example_tests.py
-    - python test/noise_realisation_tests.py
 
     # Make the documentation
     - pip install -r docs/requirements.txt

setup.cfg

@@ -2,3 +2,7 @@
 exclude = .git,docs,build,dist,test,examples,*__init__.py
 max-line-length = 160
 ignore = E129
+
+[tool:pytest]
+addopts =
+    --ignore test/other_test.py