NFS3 protocol specific snapshot workflows

[rajiv-jain-netapp]

Description

This PR...

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?

[rajiv-jain-netapp]

I have tested

Taking a CS-volume snapshot for the data CS-volume.
Tried to take VM-level snapshot, CloudStack asked me to select a single CS-volume instead of allowing to take a VM-level snapshot. That also worked.