Add lock instances support to disallow deleting instances

Registered by zhangjialong

According to our discussion in irc at 2017-01-11, we decided to add a lock API to change instance to maintance.
This bp is aim to implement these above.

Blueprint information

Status:
Complete
Approver:
Zhenguo Niu
Priority:
Medium
Drafter:
zhangjialong
Direction:
Approved
Assignee:
zhangjialong
Definition:
New
Series goal:
Accepted for ocata
Implementation:
Implemented
Milestone target:
None
Started by
Zhenguo Niu
Completed by
Zhenguo Niu

Related branches

Sprints

Whiteboard

Gerrit topic: https://review.openstack.org/#q,topic:bp/lock-instances,n,z

Addressed by: https://review.openstack.org/430189
    Lock instances support in Mogan(part 1)

Addressed by: https://review.openstack.org/431490
    Lock instances support in Mogan(part 2)

Addressed by: https://review.openstack.org/434823
    Lock instances support in Mogan(part 3)

(?)

Work Items

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