Correct misspelling of connection action

Author: Jamie Snape

core/controllers/InstallController.php

@@ -300,8 +300,8 @@ function step3Action()
       }
     } // end method step2Action
 
-  /** ajax function which tests connectivity to a db */
-  public function testconnexionAction()
+  /** AJAX function which tests connectivity to a database */
+  public function testconnectionAction()
     {
     $this->requireAjaxRequest();
     $this->_helper->layout->disableLayout();

core/public/js/install/install.step2.js

@@ -68,7 +68,7 @@
 
           $.ajax({
           type: "POST",
-          url: json.global.webroot+'/install/testconnexion',
+          url: json.global.webroot+'/install/testconnection',
           data: {type: obj.find('[name=type]').val(), host: obj.find('[name=host]').val(), username: obj.find('[name=username]').val(),
             password: obj.find('[name=password]').val(),dbname: obj.find('[name=dbname]').val(),port: obj.find('[name=port]').val()},
           cache:false,