Fix httpd apply in Ubuntu Precise

Alteration of the Apache configuration for apply in the Ubuntu Precise.

It was changed for mod_disk_cache because mod_cache_disk not exist for the
Precise and check Apache Version due the parameter "Require all Granted".

Change-Id: Icc1d13fc39058f147bdbb1e6b9a810143051ece4
Co-Authored-By: Maitê Balhester <mbalhest@thoughtworks.com>

manifests/api.pp

@@ -71,8 +71,14 @@ class openstack_health::api(
       ensure => present,
     }
   }
-  if ! defined(Httpd::Mod['cache_disk']) {
-    httpd::mod { 'cache_disk':
+
+  if $::operatingsystem == 'Ubuntu' and $::operatingsystemrelease == '12.04' {
+    $cache_disk_module = 'disk_cache'
+  } else {
+    $cache_disk_module = 'cache_disk'
+  }
+  if ! defined(Httpd::Mod[$cache_disk_module]) {
+    httpd::mod { $cache_disk_module:
       ensure => present,
     }
   }

templates/openstack-health-api.vhost.erb

@@ -20,17 +20,23 @@ WSGIPythonHome <%= scope.lookupvar("openstack_health::api::virtualenv_dir") %>
 
     Order allow,deny
     Allow from all
-    Require all granted
+    <IfVersion >= 2.4>
+     Require all granted
+    </IfVersion>
   </Directory>
 
   <IfModule mod_cache.c>
-    <IfModule mod_cache_disk.c>
+    <% if @operatingsystem == "Ubuntu" and @operatingsystemrelease == "12.04" %>
+     <IfModule mod_disk_cache.c>
+    <% else %>
+     <IfModule mod_cache_disk.c>
+    <% end %>
         CacheRoot "/var/cache/apache2/mod_disk_cache"
         CacheEnable disk  "/"
         CacheDirLevels 5
         CacheDirLength 3
         CacheLock on
-    </IfModule>
+     </IfModule>
   </IfModule>
 
   DocumentRoot <%= scope.lookupvar("openstack_health::api::api_dir") %>

templates/openstack-health-frontend.vhost.erb

@@ -12,7 +12,9 @@ Listen <%= @vhost_port %>
   <Directory <%= @frontend_dir %>>
     Order allow,deny
     Allow from all
-    Require all granted
+    <IfVersion >= 2.4>
+     Require all granted
+    </IfVersion>
   </Directory>
 
   DocumentRoot <%= @frontend_dir %>