Support 'region' filter to list stack

Registered by huangtianhua on 2015-05-11

After the bp https://blueprints.launchpad.net/heat/+spec/multi-region-support, I believe user want to describe stacks filter by 'region', may be we can add a 'region' column for 'stack' table, and store the info, and then support 'region' filter of stack list API.

Blueprint information

Status:
Not started
Approver:
None
Priority:
Undefined
Drafter:
huangtianhua
Direction:
Needs approval
Assignee:
huangtianhua
Definition:
New
Series goal:
None
Implementation:
Unknown
Milestone target:
None

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