ZF-12070: Zend_Feed_Writer does not accept UNIX timestamps which are not 10 digits

Description

An extension of ZF-12023 to fix additional problem areas:

Zend_Feed_Writer_Entry Zend_Feed_Writer_Deleted

Comments

Fixed in trunk r24641 Merged to release-1.11 in r24642 ZF2 PR #841: https://github.com/zendframework/zf2/pull/841