clean up test_submissions

- cleaner formatting
- use assertIn instead of ghetto version of that
check for form metadata in SubmissionTest
add explicit-form-properties branch of couchforms
use clean_trans instead of html_trans for page titles
Merge pull request #3202 from dimagi/title-fix

use clean_trans instead of html_trans for page titles
Merge pull request #3196 from dimagi/submission-metadata-test

Submission metadata test
filter CCT-dependent reports by user_id