for plugins CI only run the UI job on PHP 5.5 and not php 5.6 (running UI test...

for plugins CI only run the UI job on PHP 5.5 and not php 5.6 (running UI test job twice has no benefit)

plugins/CoreConsole/TravisYmlView.php

@@ -215,6 +215,8 @@ class TravisYmlView extends View
                                       'env' => 'TEST_SUITE=UITests MYSQL_ADAPTER=PDO_MYSQL');
             $testsToExclude[] = array('php' => '5.4',
                                       'env' => 'TEST_SUITE=UITests MYSQL_ADAPTER=PDO_MYSQL');
+            $testsToExclude[] = array('php' => '5.6',
+                                      'env' => 'TEST_SUITE=UITests MYSQL_ADAPTER=PDO_MYSQL');
         }
 
         if (!empty($this->pluginName)