Add jobs table in v2.
The other tables,api and test will be added in following patch.
ref: https://storyboard.openstack.org/#!/story/2004132
Story: #2004132
Task: #27578
Change-Id: Id9a182f7b699f8079cdf31ded8c2ca6e7d26078a
Implements: bp add-mysql-support-for-freezer