Adding apache redirect for the cacti url.

As cacti is currently simply being installed via the package
manager, there is no vhosts file. I have added the apache
rewrite rule to apache.conf file that comes with the ubuntu/
debian package.

When accessing the root of the cacti site (cacti.openstack.org)
you will now be redirected to cacti.o.o/cacti/graph_view.php.
I.E:
  RewriteRule ^/$ /cacti/graph_view.php [R,L]

Note, in new deployments the guest user needs to be enabled
otherwise all you'll see is a login screen.

Change-Id: I5242c9daf2ef105b2f685f9f6b2dc4509f9c5dc2

modules/openstack_project/files/cacti/apache.conf

@@ -0,0 +1,30 @@
+# ************************************
+# Managed by Puppet
+# ************************************
+
+Alias /cacti /usr/share/cacti/site
+
+RewriteEngine on
+RewriteRule ^/$ /cacti/graph_view.php [R,L]
+
+<Directory /usr/share/cacti/site>
+  Options +FollowSymLinks
+  AllowOverride None
+  order allow,deny
+  allow from all
+
+  AddType application/x-httpd-php .php
+
+  <IfModule mod_php5.c>
+    php_flag magic_quotes_gpc Off
+    php_flag short_open_tag On
+    php_flag register_globals Off
+    php_flag register_argc_argv On
+    php_flag track_vars On
+    # this setting is necessary for some locales
+    php_value mbstring.func_overload 0
+    php_value include_path .
+  </IfModule>
+
+  DirectoryIndex index.php
+</Directory>

modules/openstack_project/manifests/cacti.pp

@@ -11,10 +11,23 @@ class openstack_project::cacti (
 
   include apache
 
+  a2mod { 'rewrite':
+    ensure => present,
+  }
+
   package { 'cacti':
     ensure => present,
   }
 
+  file { '/etc/apache2/conf-available/cacti.conf':
+    ensure  => present,
+    source  => 'puppet:///modules/openstack_project/cacti/apache.conf',
+    mode    => '0644',
+    owner   => 'root',
+    group   => 'root',
+    require => Package['cacti'],
+  }
+
   file { '/usr/local/share/cacti/resource/snmp_queries':
     ensure => directory,
     owner  => 'root',