CLOUDSTACK-4262: Wait twice network.gc for vpcvr shutdown
CLOUDSTACK-4262: Wait twice network.gc for vpcvr shutdown

Wait a little bit longer for the VpcVr to shutdown on network shutdown.

Signed-off-by: Prasanna Santhanam <82219615980488abd2acc1a3d71cfb58f0b2b8b6@apache.org>

mufaddalq/cloudstack-datera-driver,mufaddalq/cloudstack-datera-driver,mufaddalq/cloudstack-datera-driver,mufaddalq/cloudstack-datera-driver,mufaddalq/cloudstack-datera-driver,mufaddalq/cloudstack-datera-driver