KVM - Don't fail to start due to old VM definition. On rare occasion we see
inactive VM definitions block a new VM starting. Definitions aren't supposed to
be persistent, but sometimes a crash or failed migration can leave behind a
definition.

Signed-off-by: Marcus Sorensen <marcus@betterservers.com> 1370299734 -0600
CLOUDSTACK-2782: UI - Infrastructure menu - zone detail page - add new action Add VMWare DC.
CLOUDSTACK-2782: UI - Infrastructure menu - zone detail page - implement Remove VMWare DC action.