vtllibrary: Add customisation for Scalar libraries

Set vendor uniq field 'BarC' in Inquiry page.
Also add 'build date' into "Full Firmware Revision Level" field

Quantum doco describes this field as:
"Same as the firmware revision level, but extended to include the
build number (if available)."
Hijacking "Full Firmware Revision Level" field for
'build date/time' of the mhvtl library daemon.

Signed-off-by: Mark Harvey <markh794@gmail.com>