Remove remaining container_release properties

The lxc_container_create role has been updated to build containers to
the same distribution and release as the host machine. The
container_release property defined in environment files used to
generate inventory is no longer required.

I7d2aea8f6548feb381bf2354965f05fa0a9a99b8 removed this property from
half of the environment files. This change removes it from all remaining
files.

Change-Id: I8bff7613639676797159eac75cef0dd091bda7a4

etc/openstack_deploy/env.d/keystone.yml

@@ -28,7 +28,6 @@ container_skel:
       - keystone
     properties:
       service_name: keystone
-      container_release: trusty
 
 
 physical_skel:

etc/openstack_deploy/env.d/memcache.yml

@@ -28,4 +28,3 @@ container_skel:
       - memcached
     properties:
       service_name: memcached
-      container_release: trusty

etc/openstack_deploy/env.d/pkg_repo.yml

@@ -27,7 +27,6 @@ container_skel:
       - pkg_repo
     properties:
       service_name: repo
-      container_release: trusty
 
 
 physical_skel:

etc/openstack_deploy/env.d/rabbitmq.yml

@@ -28,4 +28,3 @@ container_skel:
       - rabbitmq
     properties:
       service_name: rabbitmq
-      container_release: trusty

etc/openstack_deploy/env.d/rsyslog.yml

@@ -27,7 +27,6 @@ container_skel:
       - rsyslog
     properties:
       service_name: rsyslog
-      container_release: trusty
 
 
 physical_skel:

etc/openstack_deploy/env.d/swift.yml

@@ -36,7 +36,6 @@ container_skel:
       - swift_proxy
     properties:
       service_name: swift
-      container_release: trusty
   swift_acc_container:
     belongs_to:
       - swift_containers
@@ -45,7 +44,6 @@ container_skel:
     properties:
       is_metal: true
       service_name: swift
-      container_release: trusty
   swift_obj_container:
     belongs_to:
       - swift_containers
@@ -54,7 +52,6 @@ container_skel:
     properties:
       is_metal: true
       service_name: swift
-      container_release: trusty
   swift_cont_container:
     belongs_to:
       - swift_containers
@@ -63,7 +60,6 @@ container_skel:
     properties:
       is_metal: true
       service_name: swift
-      container_release: trusty
 
 
 physical_skel:

etc/openstack_deploy/env.d/utility.yml

@@ -28,4 +28,3 @@ container_skel:
       - utility
     properties:
       service_name: utility
-      container_release: trusty