ci(gitlab-ci): use templates from a common repository

.gitlab-ci.yml

@@ -7,4 +7,6 @@
     ref: "branch/default"
     file:
       - "templates/no-duplicated-ci-pipelines.yml"  # use workflow to avoid duplicated pipelines
+      - "templates/lint/twine-check.yml"  # will run twine check to see if pypi won't reject the package
+      - "templates/lint/check-dependencies-resolution.yml"  # will run pip-compile -n to check if dependencies are compatibles
       - "templates/lint/yamllint.yml"  # will do the equivalent of 'tox -e yamllint'
@@ -10,5 +12,4 @@
       - "templates/lint/yamllint.yml"  # will do the equivalent of 'tox -e yamllint'
-      - "templates/tests/py27.yml"  # will do the equivalent of 'tox -e py27'
       - "templates/create-release-on-heptapod.yml"  # this will create a release on heptapod
       - "templates/upload-to-pypi.yml"  # on a new mercurial tag (expected to be done with release-new), will push a release on pypi
   # uncomment and uses to customize/extend the configuration here if needed