Add molecule test for bootstrap-os (#5845)

.gitlab-ci/vagrant.yml

@@ -0,0 +1,16 @@
+---
+
+molecule_tests:
+  tags: [vagrant]
+  only: [/^pr-.*$/]
+  except: ['triggers']
+  image: quay.io/miouge/kubespray-vagrant
+  services: []
+  stage: deploy-part1
+  before_script:
+    - tests/scripts/rebase.sh
+    - apt-get update && apt-get install -y python3-pip
+    - update-alternatives --install /usr/bin/python python /usr/bin/python3 10
+    - python -m pip install -r tests/requirements.txt
+  script:
+    - ./tests/scripts/molecule_run.sh