correctly filter case action diffs
correctly filter case action diffs

Prior to the diff fix for OrderedDict (993c99028d2) the diff
for case actions was a 'type' diff since the couch version
was a dict and the SQL version was an OrderedDict

After the fix the diff is a per field diff.

dimagi/commcare-hq,dimagi/commcare-hq,dimagi/commcare-hq,dimagi/commcare-hq,dimagi/commcare-hq