ZF-2938: Non-existing method getRequired() in Zend_Form-Elements docs.

Description

There is documented method getRequired() in Zend_Form docs, but this methond doesn't exist.

Zend_Form-Elements.xml:655: ```

Comments

Please categorize/fix as needed.

Scheduling for next mini release

Fixed in r9308.

Changing to comply with new IT coventions for components.