PersistentCollection - initialize coll - create failing tests
Initialize coll when using Collection methods inside PersistentCollection
do not initialize coll on add()
remove redundant require_once for TestInit.php
convert PersistentCollection functional tests to unit tests
Merge pull request #731 from austinsmorris/PersistentCollection-initialize-coll

[DDC-2564] - PersistentCollection - initialize coll