added new option to identical validator
Fixed PHPDoc blocks
changed exception to type hinting
Merge pull request #3844 from wryck7/fix-identical-validator

Added new option to fix a little issue originated from last PR

Conflicts:
	tests/ZendTest/Validator/IdenticalTest.php
[#3844] Remove tests no longer present in develop

- Two tests were present on master but removed in develop -- and brought
  back in during merge. Removed.
Merge branch 'feature/3844' into develop

Close #3844