Add mistral workflow module path to mistral ansible config
Add mistral workflow module path to mistral ansible config

This change extends the module path found within the the `package_update`
workflow so that we can ensure proper access to modules when ansible commands
are run from within the mistral container.

Change-Id: Id912a0786451825f48822b209400f0f72758dfc8
Signed-off-by: Kevin Carter <1d9a750a4fc7026fb02029431dc8a87d24487135@redhat.com>

openstack/tripleo-common,openstack/tripleo-common