Ensure settings changes only touch affected configurations

Registered by Alex Schultz

When rerunning a task a second time with specific configuration changes, we expect:
1) Re-running of a Task with changes in input data results in changes made only in configuration parameters for which input values were changed
2) Re-running of a Task does not result in unnecessary restart and/or downtime of cloud services
3) If a service restart or downtime is required when configuration changes are required, a notification the end user prior to running the change should be done.

Blueprint information

Status:
Complete
Approver:
None
Priority:
Essential
Drafter:
Alex Schultz
Direction:
Approved
Assignee:
None
Definition:
Approved
Series goal:
Accepted for mitaka
Implementation:
Implemented
Milestone target:
milestone icon 9.0
Started by
Alex Schultz
Completed by
Szymon Banka

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Gerrit topic: https://review.openstack.org/#q,topic:bug/1555360,n,z

Addressed by: https://review.openstack.org/290915
    Fix cinder type ensurabilty

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