testutil: WithContext will cancel context on teardown
rework tests to use transactions only on DB tests, prepare static test data for db
rework tests, add fixed payment db test data for test db
test fixtures with valid project key secret
activate test fixture payment method
failing notification test: when notifying inside transaction, it would
not contain the actual state
it is actually an error on callback with no tx, there must be a tx
present
Call notification after db transaction
fix tests to work with fixtures
beautify imports
Merge pull request #76 from wongak/notification_logic

Reworking test fixtures, Notification logic