Wait for bootstrap containers on the same hosts they run

Change-Id: Id6a82e6622f712c6fca8205357dec4e5161e46d2
Closes-Bug: #1487387

ansible/roles/neutron/tasks/bootstrap.yml

@@ -52,6 +52,7 @@
 
 - name: Waiting for bootstrap container to exit
   command: docker wait bootstrap_neutron
+  run_once: True
   when: database.stdout.find('localhost | SUCCESS => ') != -1 and (database.stdout.split('localhost | SUCCESS => ')[1]|from_json).changed
 
 - name: Cleaning up Neutron boostrap container

ansible/roles/nova/tasks/bootstrap.yml

@@ -51,6 +51,7 @@
 # https://github.com/ansible/ansible-modules-core/pull/1031
 - name: Waiting for bootstrap container to exit
   command: docker wait bootstrap_nova
+  run_once: True
   when: database.stdout.find('localhost | SUCCESS => ') != -1 and (database.stdout.split('localhost | SUCCESS => ')[1]|from_json).changed
 
 - name: Cleaning up Nova boostrap container