Ensure designate user/group exist

Without the ensure line, Puppet will only try to manage the attributes
on these resources.  This issue only occurs if the system packages don't
create the users.

Change-Id: Id46f06a03c31c1dd29971fec21703715744ab8d5

manifests/init.pp

@@ -60,6 +60,7 @@ class designate(
   }
 
   user { 'designate':
+    ensure  => 'present',
     name    => 'designate',
     gid     => 'designate',
     groups  => ['designate',$::dns::params::group],
@@ -68,6 +69,7 @@ class designate(
   }
 
   group { 'designate':
+    ensure  => 'present',
     name    => 'designate',
     require => Package['designate-common'],
   }

spec/classes/designate_init_spec.rb

@@ -39,16 +39,18 @@ describe 'designate' do
 
     it 'configures designate group' do
       should contain_group('designate').with(
+        :ensure  => 'present',
         :name    => 'designate',
-        :require => 'Package[designate-common]'
+        :require => 'Package[designate-common]',
       )
     end
 
     it 'configures designate user' do
       should contain_user('designate').with(
+        :ensure  => 'present',
         :name    => 'designate',
         :gid     => 'designate',
-        :system  => true
+        :system  => true,
       )
     end