Proposed change for create_volume in provisioning.py

[StorageAdmin]

New_create_volume.txt

I needed to expand the create_volume function. This new one optionally allows the LUN to be added to a server and specify an LUN number if desired.

It would be nice to replace the existing create_volume definition with this one.

[anupamaloke]

@StorageAdmin, thank you for submitting this feature request. We will review the proposed changes and get back to you as soon as possible.