Implement XML support to Manila client

Registered by Valeriy Ponomaryov

Manila service handles two types of data containers: JSON and XML.
Current Manila client handles only JSON requests/responses.
Propose is implement XML support and create optional flag --container-type, which, by default, equals to "json", and can set to "xml" to operate XML requests.

Blueprint information

Status:
Complete
Approver:
Ben Swartzlander
Priority:
Not
Drafter:
None
Direction:
Approved
Assignee:
None
Definition:
Superseded
Series goal:
None
Implementation:
Unknown
Milestone target:
None
Completed by
Ben Swartzlander

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