Change test_get_default_quotas to use assertEqual

test_get_default_quotas currently uses assertSequenceEqual to compare
quota sets which causes equal, but differently ordered, sets to fail.
This change switches to assertEquals to allow those sets to succeed.

Change-Id: Ib11bc915673404b852e77a72222d388dba8a4ead
Fixes: bug #1118754
Merge "Change test_get_default_quotas to use assertEqual"