Refactoring of ProphetStor Block Storage driver

Registered by mike.liao

We found that it is hard to maintain the present source code.
We cannot support new functions and new drivers because maintenance being difficult.
So we have to refactor the source codes.

Blueprint information

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

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