Return an error if tripleo-ansible deployed containers

For now, we assume that tripleo-ansible & paunch aren't playing well
together. So let's make sure that when containers were deployed with
tripleo-ansible, paunch CLI can't be used anymore.

Change-Id: I3f79a42da8798e24fad1a3ccc18efcc26e118c4d
(cherry picked from commit 3e19521fd4)

paunch/builder/base.py

@@ -36,6 +36,11 @@ class BaseBuilder(object):
         self.cont_log_path = cont_log_path
         self.healthcheck_disabled = healthcheck_disabled
 
+        if os.path.isfile('/var/lib/tripleo-config/.ansible-managed'):
+            msg = ('Containers were previously deployed with '
+                   'tripleo-ansible, paunch CLI can not be used.')
+            raise RuntimeError(msg)
+
     def apply(self):
 
         stdout = []