Add folder molecule/ to ansible-lint call in molecule lint commands

* When providing . as the folder path of the lintables to ansible-lint
it does not lint the folder molecule/default containing converge.yml,
prepare.yml, verify.yml, hence folder molecule/ needs to be added to
the ansible-lint call in the molecule lint commands.

Author: christianhueserhzdr

molecule/default/molecule.yml

@@ -18,7 +18,7 @@ platforms:
       - /sys/fs/cgroup:/sys/fs/cgroup:ro
 lint: |
   yamllint --strict --format colored . &&
-  ansible-lint -v --force-color --offline --exclude .pipenv/ .
+  ansible-lint -v --force-color --offline --exclude .pipenv/ . molecule/
 provisioner:
   name: ansible
   playbooks: