fix : python3 -> python

.gitlab/ci/ubuntu_python.gitlab-ci.yml

@@ -78,15 +78,15 @@ coverage:ubuntu_python:
   before_script: 
     - apt-get update
     - apt-get install -y python-is-python3 python3-pip
-    - python3 -m pip install numpy coverage requests
+    - python -m pip install numpy coverage requests
   script:
     - source venv/bin/activate
     - cd ${CI_PROJECT_NAME}
     # Retrieve the installation path of the module, since it is installed with pip.
     - export MODULE_LOCATION=`python -c "import ${CI_PROJECT_NAME} as _; print(_.__path__[0])"`
-    - python3 -m coverage run --source=$MODULE_LOCATION -m unittest discover -s unit_tests/ -v -b
-    - python3 -m coverage report
-    - python3 -m coverage xml
+    - python -m coverage run --source=$MODULE_LOCATION -m unittest discover -s unit_tests/ -v -b
+    - python -m coverage report
+    - python -m coverage xml
   coverage: '/(?i)total.*? (100(?:\.0+)?\%|[1-9]?\d(?:\.\d+)?\%)$/'
   artifacts:
     reports: