Cleanup in ChangeOpClaimTest

A bit of cleanup in ChangeOpClaimTest and make use
of StatementList there, and added test for statements
on properties, which is broken. (see bug 72671)

ChangeOpClaim and ChangeOpClaimTest are still a terrible
mess that needs further refactoring and sort out confusion
of statements vs. claims on things.

Change-Id: Idfe2bd9a329b473610919ca2f3ac3e1ea9873988
Merge "Cleanup in ChangeOpClaimTest"