Fetch all lazy properties when entity is already loaded fails

[danko-d]

Fix for the new test TestFetchAllPropertiesAfterEntityIsInitialized in FetchLazyPropertiesFixture.

Prior to this fix, the second query below would fail:

Person person;
using(var s = OpenSession())
{
    person = s.CreateQuery("from Person where Id = 1").UniqueResult<Person>();
    var image = person.Image;
    person = s.CreateQuery("from Person fetch all properties where Id = 1").UniqueResult<Person>();
}

The problem was with the indexes and lazyIndexes arrays in InitializeLazyProperties() of AbstractEntityPersister when allLazyProperties was true. This could, in turn, cause IndexOutOfRangeException or InvalidCastException.

[maca88]

@danko-d thanks for the fix, which fixes a regression made by #1922.