Fixes vhost and vhost::proxy on Precise.

We recently introduced on bf7ce40e2f the
use of mod_version. The module is enabled and installed by default on
Ubuntu Trusty 14.04, CentOS 6 and CentOS 7.

On Ubuntu Precise 12.04 the module comes installed, but not enabled by
default. This is needed to maintain compatibility with downstream pool
of servers.

Change-Id: I01a8a12b959e3cbecd0355562db0393404ae54bf
Co-Authored-By: Danilo Ramalho <dramalho@thoughtworks.com>

manifests/vhost.pp

@@ -66,6 +66,12 @@ define httpd::vhost(
     }
   }
 
+  # The Apache mod_version module only needs to be enabled on Ubuntu 12.04
+  # as it comes compiled and enabled by default on newer OS, including CentOS
+  if !defined(Httpd::Mod['version']) and $::operatingsystem == 'Ubuntu' and $::operatingsystemrelease == '12.04' {
+    httpd::mod { 'version': ensure => present }
+  }
+
   file { "${priority}-${name}.conf":
       path    => "${httpd::params::vdir}/${priority}-${name}.conf",
       content => template($template),

manifests/vhost/proxy.pp

@@ -45,6 +45,12 @@ define httpd::vhost::proxy (
     include ::httpd::ssl
   }
 
+  # The Apache mod_version module only needs to be enabled on Ubuntu 12.04
+  # as it comes compiled and enabled by default on newer OS, including CentOS
+  if !defined(Httpd::Mod['version']) and $::operatingsystem == 'Ubuntu' and $::operatingsystemrelease == '12.04' {
+    httpd::mod { 'version': ensure => present }
+  }
+
   file { "${priority}-${name}":
     ensure => absent,
     path   => "${httpd::params::vdir}/${priority}-${name}",