(bug 44440) ReferencedEntitiesFinder::findClaimLinks aware about Statements now

ReferencedEntitiesFinder::findClaimLinks now considers Statement's references.
Added simple test for this case.

Change-Id: Ic205d6406ea21fdaa9da60a4487cb0b844f216e8
Merge "(bug 44440) ReferencedEntitiesFinder::findClaimLinks aware about Statements now"