Allow removal of specific ResourceGroup members on update

Registered by Steven Hardy

"elide" required feature for TripleO (see https://review.openstack.org/#/c/123713/), which is currently provided via merge.py, but we want to allow equivalent functionality via heat directly, where a specific victim or victims can be specified when doing a stack update, e.g to exclude known-bad resources from the group

Blueprint information

Status:
Complete
Approver:
None
Priority:
Undefined
Drafter:
Steven Hardy
Direction:
Needs approval
Assignee:
Steven Hardy
Definition:
New
Series goal:
Accepted for juno
Implementation:
Implemented
Milestone target:
milestone icon 2014.2.2
Started by
Angus Salkeld
Completed by
Angus Salkeld

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Gerrit topic: https://review.openstack.org/#q,topic:bp/resourcegroup-force-remove,n,z

Addressed by: https://review.openstack.org/128364
    ResourceGroup update refactor

Addressed by: https://review.openstack.org/128365
    ResourceGroup add "force_remove" property

(?)

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