Apache: Disable default mods

We should load the required mods automatically instead of relying on
the list of modules loaded by puppetlabs-apache by default.

Change-Id: I8f60238ddb82c188dc2042ab38fedb3b0edbaef3

hiera/common.yaml

@@ -1,2 +1 @@
 ---
-apache::default_vhost: false

manifests/apache.pp

@@ -2,5 +2,8 @@ class openstack_integration::apache {
 
   include openstack_integration::params
   include openstack_integration::config
-  include apache
+  class { 'apache':
+    default_mods  => false,
+    default_vhost => false,
+  }
 }