Update Predicate.php

Added "NOT IN" predicate.
test the "not in" predicate

provide adequate test unit for the "not in" predicate.
PR #4781
Merge branch 'master' of git://github.com/sebastien-gallet/zf2 into sebastien-gallet-master

* 'master' of git://github.com/sebastien-gallet/zf2:
  test the "not in" predicate
  Update Predicate.php
Merging PR #4781
Merge branch 'sebastien-gallet-master' into develop

* sebastien-gallet-master:
  test the "not in" predicate
  Update Predicate.php