Fix extra lazy get

I made a big mistake in PR #706, my apologies. The get() function in the OneToManyPersister and ManyToManyPersister  did not add the collection owner to the load query.

The first commit in this PR fixes this for the OneToMayPersister.

I could not find a way to fix this for the ManyToManyPersister. Problem is that you can only use conditions on the owning side of a ManyToMany relation, not on the inverse side. Code like `load(array($mapping['inversedBy'] => $coll->getOwner()), ...)` gave an ORMException.

Therefor, the second commit in this PR removes the extra-lazy-get for ManyToMany relations. If anyone has any ideas how to make this work for the ManyToMany side, please let me know.