pep8 and i18n SubmissionsByFormReport
refactor SubmitHistory

- replace es_query and es_response with a simple @memoized
- make es_results way less terse
- change return type of pull_users_and_groups to accept accessing fields as attributes
- change return type of _report_user_dict similarly
Merge branch 'multimedia-case-properties' into autostaging
Merge remote-tracking branch 'origin/sql-dailyformstats' into autostaging
Merge branch 'pretty-user-display' into autostaging
Merge remote-tracking branch 'origin/cache-locations' into autostaging
Merge remote-tracking branch 'origin/hq-dropdown' into autostaging
Merge remote-tracking branch 'origin/uth' into autostaging
Merge remote-tracking branch 'origin/mailchimp3' into autostaging
Merge branch 'fix-submit-history' into autostaging
update submodule refs