Twiddle default openstack-origin to work like cinder

config.yaml

@@ -15,7 +15,7 @@ options:
       traffic to the external public network.
   openstack-origin:
     type: string
-    default: cloud:precise-folsom
+    default: distro
     description: |
       Optional configuration to support use of additional sources such as:
       .
@@ -23,6 +23,8 @@ options:
         - cloud:precise-folsom/proposed
         - cloud:precise-folsom
         - deb http://my.archive.com/ubuntu main|KEYID
+      .
+      Note that quantum/neutron is only supports > Folsom.
   rabbit-user:
     type: string
     default: nova

hooks/quantum_hooks.py

@@ -14,7 +14,8 @@ from charmhelpers.fetch import (
     filter_installed_packages,
 )
 from charmhelpers.core.host import (
-    restart_on_change
+    restart_on_change,
+    lsb_release
 )
 from charmhelpers.contrib.hahelpers.cluster import(
     eligible_leader
@@ -50,7 +51,11 @@ CONFIGS = register_configs()
 
 @hooks.hook('install')
 def install():
-    configure_installation_source(config('openstack-origin'))
+    src = config('openstack-origin')
+    if (lsb_release()['DISTRIB_CODENAME'] == 'precise' and
+        src == 'distro'):
+        src = 'cloud:precise-folsom'
+    configure_installation_source(src)
     apt_update(fatal=True)
     if valid_plugin():
         apt_install(filter_installed_packages(get_early_packages()),