Include ansible commands for ansible linting

The plugin repo needs to be cloned for ansible-lint to
understand ansible plugins. The commands currently
reside in tox.ini under the ansible section and are not
currently included. This commit fixes that error.

Change-Id: Iab013aba9c42631e49e17f7001aa78b6bfcdd662

tox.ini

@@ -146,6 +146,7 @@ commands =
 deps =
     {[testenv:ansible]deps}
 commands =
+    {[testenv:ansible]commands}
     ansible-lint {toxinidir}