Integrate with Notification System

Integrate with oslo notifier to send out notifications on table CRUD
and data item CRUD activities.

Change-Id: I0fc228d15392b6ba58e892b471adf9acd51f178a
Implements: blueprint magnetodb-notifications
Fix streaming API

Fix streaming API to work properly with eventlet
Add missing data to streaming API config file

Change-Id: I0d206f757dd3c734d3159486c6b49a04bd1f09dc
Merge "Fix streaming API"