bug CLOUDSTACK-2371 after with nicira integration

[Jayapal Reddy Uradi]

Hi Hugo,

Bug CLOUDSTACK-2371 NPE is introduced with commit 
79c7da07abd4294f150851aa0c2d06a28564c5a9 while deleting private gateway.

Can you please looking into the issue.

commit 79c7da07abd4294f150851aa0c2d06a28564c5a9
Author: Hugo Trippaers <htrippa...@schubergphilis.com>
Date:   Wed Jul 11 16:14:28 2012 -0700

    Phase 1 of Nicira integration


Thanks,
Jayapal