failing test for #364
 record credit card failures in the DB (closes #364)
Add test for error result being recorded
Merge pull request #3011 from gratipay/record-cc-failures

Record credit card failures in the DB
work around honcho's problem with python 2.7.9
Merge pull request #3028 from gratipay/honcho-hack

Work around honcho's problem with python 2.7.9
drop the `is_locked` column
fix tests
remove obsolete comment
removed unused variable