Let user specify storage_size unit
As of now, the number passed in as storage_space is forcibly turned into a percentage (a % sign is appended to it). vssadmin.exe also accepts absolute values (e.g. 500GB), therefore I think the user should be given the freedom to specify for that parameter any value that vssadmin supports.
Proposed change:
- accept string for storage_space module parameter
- don't append % sign to storage_space value