* @param $controllerName The controller we shall resolve
* @param $applicationInstance An instance of a manageable application helper class
* @return $resolverInstance The prepared controller resolver instance
* @throws EmptyVariableException Thrown if default controller is not set
* @throws InvalidControllerException Thrown if default controller is invalid
*/
* @param $controllerName The controller we shall resolve
* @param $applicationInstance An instance of a manageable application helper class
* @return $resolverInstance The prepared controller resolver instance
* @throws EmptyVariableException Thrown if default controller is not set
* @throws InvalidControllerException Thrown if default controller is invalid
*/