Try to keep smoke testing using system wide installation

Signed-off-by: Jose Luis Rivero <[email protected]>

.github/workflows/main.yml

@@ -21,7 +21,7 @@ jobs:
         run: |
           python -m pip install --upgrade pip
           pip install flake8 pytest
-          if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
+          if [ -f requirements.txt ]; then pip install --system -r requirements.txt; fi
       - name: Lint with flake8
         run: |
           # stop the build if there are Python syntax errors or undefined names
@@ -33,6 +33,7 @@ jobs:
           python3 plugins/*_TEST.py
       - name: Smoke system tests
         run: |
+          sudo ./gzdev.py repository enable osrf stable
           python3 gzdev.py repository list
           python3 gzdev.py ign-docker-env citadel
           python3 gzdev.py ign-docker-env dome --linux-distro ubuntu:bionic