Fixed coverity and other resource leak issues

Signed-off-by: Santhosh Edukulla <santhosh.edukulla@gmail.com>
Config value having different category in SQL and Config.java.
CLOUDSTACK-7739: Add new vGPU types K160Q, K180Q, K280Q to the CloudStack UI.
CLOUDSTACK-7727 Skip various BVT tests on LXC

A number of BVT tests are not valid for LXC (e.g. migrating a VM), so this patch
ensures they skip if LXC is in use.

Signed-off-by: SrikanteswaraRao Talluri <talluri@apache.org>