fix "cannot redefine $real_settings" error

Trying to use the apache_config class to apply settings to the apache
SAPI fails with an error caused by a duplicate variable definition:

Error while evaluating a Resource Statement, Evaluation Error: Cannot reassign variable '$real_settings' (file:
/etc/puppetlabs/code/environments/development/modules/php/manifests/apache_config.pp, line: 18, column: 18)

Author: crispygoth

manifests/apache_config.pp

@@ -15,7 +15,7 @@
 
   assert_private()
 
-  $real_settings = $real_settings = lookup('php::apache::settings', Hash, {'strategy' => 'deep', 'merge_hash_arrays' => true}, $settings)
+  $real_settings = lookup('php::apache::settings', Hash, {'strategy' => 'deep', 'merge_hash_arrays' => true}, $settings)
 
   php::config { 'apache':
     file   => $inifile,