ci: git mv unit_tests.py tests_unit_tests.py

For an easier launch of the unit tests by `pytest`, file
`unit_tests.py` was renamed and thus now is discovered automatically
from the root of the project.

Signed-off-by: Norwid Behrnd <nbehrnd@yahoo.com>

.github/workflows/ci_pytest.yml

@@ -44,6 +44,5 @@ jobs:
 
       - name: verbose pytest
         run: |
-          cd tests
-          python -m pytest unit_tests.py
-          python -m pytest unit_tests.py -v
+          pytest
+          pytest -v

tests/call_tests.sh

@@ -1,5 +1,5 @@
 #!/bin/sh
 cd $(dirname $0)/..
-PYTHONPATH=".:" tests/unit_tests.py --verbose
+PYTHONPATH=".:" tests/test_unit_tests.py --verbose
 
 #end