CSTACKEX-306: support for create CS colume from CS snapshot on the lo… - #107

1. CS volume can be created from CS-volume snapshot only, it will not be supported with VM level snapshot
2. type of CS volume would be data for both Root and Data CS volume-snapshot.
3. Cloudstack will not create bootable root type of volume with this usecase support. User is recommended to to use create template from the root volume and take it forward to create new bootable root volumes.
4. create CS volume would be residing on the same primary storage pool. cloudstack does not provide any option to user to choose the destination storage-pool.

Types of changes

• Breaking change (fix or feature that would cause existing functionality to change)
• New feature (non-breaking change which adds functionality)
• Bug fix (non-breaking change which fixes an issue)
• Enhancement (improves an existing feature and functionality)
• Cleanup (Code refactoring and cleanup, that may add test cases)
• Build/CI
• Test (unit or integration test code)

Feature/Enhancement Scale or Bug Severity

Feature/Enhancement Scale

• Major
• Minor

Bug Severity

• BLOCKER
• Critical
• Major
• Minor
• Trivial

Screenshots (if appropriate):

How Has This Been Tested?

How did you try to break this feature and the system with this change?