Revert "designate: show barclamp"

This reverts commit 64e7ad9.

We've are very close to the release and have multiple pull requests still open
for Designate:

* crowbar#2095
* crowbar#2104
* crowbar#2105
* SUSE-Cloud/doc-cloud#931

There are way too many question marks on this so I am
switching the barclamp back to invisible mode. Lets get these
pull requests squared away carefully and without the rush of
imminent release.

Author: jgrassler

designate.yml

@@ -19,6 +19,8 @@ barclamp:
   display: 'Designate'
   description: 'OpenStack DNSaaS: Multi-Tenant DNSaaS service for OpenStack'
   version: 0
+  # Change to true when complete
+  user_managed: false
   requires:
     - 'keystone'
     - 'rabbitmq'