mbs-6201: add triggers to migration
mbs-6201: use loop.parity
Merge remote-tracking branch 'reo/events-triggers' into schema-change-2014-q4

* reo/events-triggers:
  mbs-6201: add triggers to migration
Merge remote-tracking branch 'reo/events-zebra' into schema-change-2014-q4

* reo/events-zebra:
  mbs-6201: use loop.parity