CA-98535: Fix VDI.create

The other_config, shareable, tags and xenstore_data fields are now set
to their correct values when creating a VDI.

Signed-off-by: John Else <john.else@citrix.com>
Merge pull request #1059 from johnelse/ca-98535-clearwater

CLEARWATER: CA-98535: Fix VDI.create