[test] pull yapps from Logilab's github
Fixes a couple of failures, pull request is almost a year old
(https://github.com/smurfix/yapps/pull/2).
for table, column in [
('transactions', 'tx_time'),
('tx_entity_actions', 'tx_uuid'),
('tx_relation_actions', 'tx_uuid')]:
repo.system_source.create_index(session, table, column)
commit()