fix(database): go through recovery if launched with stale data container

ref(database+tests): adds 'backup has been completed' marker

Slightly better test name

ref(tests): mute backup output

ref(tests): add explanatory comment to gisted patch in mock-store

chore(*): vendor lib/pq Godep reference

ref(database): mute stderr where expected, add more info traces

ref(tests): please gofmt over new changes

ref(tests): recover test: unmute stdout, loosen error handler

Author: romansergey