ZF-5930: Add setDefaultAdapter() to Zend_Auth_Adapter_DbTable


Similar with Zend_Db_Table::setDefaultAdapter() we should add also a setDefaultAdapter() for Zend_Auth_Adapter_DbTable.

Is gonna be easier to work with Zend_Auth_Adapter_DbTable derived classes then.


Correcting the component

Adds setDefaultAdapter() static method to Zend_Auth_Adapter_DbAdapter + respective case into UTs.

Per discussion with [~ralph] this issue is to be abandoned in favor of [ZF-7510]