Remove variability from object change detection unit test

Insure hashes of object representations are consistent by normalizing
data using sorted lists (as compared to dictionaries whose keys and
values are listed in an arbitrary, variable, dependent order:
https://docs.python.org/2/library/stdtypes.html#dict.items).

Closes-Bug: #1325246

Change-Id: I1344a820263683a024818d181ec6ee08e5e18984
Merge "Remove variability from object change detection unit test"