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: I066b80543c6ac5fdd6dc49ae08d4d2c323c12504

tox.ini

@@ -151,6 +151,7 @@ commands =
 deps =
     {[testenv:ansible]deps}
 commands =
+    {[testenv:ansible]commands}
     ansible-lint {toxinidir}