Adding PyTests in JetStream unit test workflow for code coverage. (#242)

Author: aman2930

.github/workflows/unit_tests.yaml

@@ -68,5 +68,7 @@ jobs:
       run: make install-deps
     - name: Run all unit tests in JetStream (jetstream/tests)
       run: make unit-tests
+    - name: Run all py tests in JetStream (jetstream/tests)
+      run: make py-tests
     - name: Create test coverage report
-      run: make check-test-coverage
+      run: make check-test-coverage