CLOUDSTACK-7800: Correcting code related to unplug NIC on VMware

Signed-off-by: SrikanteswaraRao Talluri <talluri@apache.org>
CLOUDSTACK-7837: [UI] Make the Source CIDR column wide enough to fit the CIDR value without ellipsizing

Signed-off-by: Rajani Karuturi <rajanikaruturi@gmail.com>
CLOUDSTACK-7842: wrong size column is getting updated with snapshot physical size in snapshot_store_ref table.

Also fixed the issue that snapshot size with hypervisor XS >= 6.2.5 is not getting updated in snapshot_store_ref table.