Add gitweb to gerrit servers.

Change-Id: Ibf958392eff5011e3c150a192f4fc33abc0570aa
Reviewed-on: https://review.openstack.org/266
Reviewed-by: Monty Taylor <mordred@inaugust.com>
Tested-by: Jenkins

modules/gerrit/manifests/init.pp

@@ -17,6 +17,9 @@ $commentlinks = [ { name => 'changeid',
                   ]
   ) {
   
+  package { "gitweb":
+    ensure => latest
+  }
   package { "python-dev":
     ensure => latest
   }