v.4.16.0

Improvements:

1. [LUNA-7239] The general events format has been updated: create_time and end_time fields renamed to event_create_time and event_end_time respectively. The account_id from now on is a required field as a part of event and the Luna-Account-Id header is not recognized anymore. See general events creation, getting and deletion requests for details.

Migration:

See a migration manual.