Summary: Wait for VPC router nics to hotplug before assigning IPs

Detail: CLOUDSTACK-1452, CLOUDSTACK-1523 - When rebooting VPC routers, ip addr
assignment was inconsistent, sometimes the assignment would be attempted while
router was still setting up nic device. This adds a watch for the nic to show
up before attempting to add an ip to a nic.

Signed-off-by: Marcus Sorensen <marcus@betterservers.com> 1362521453 -0700
CLOUDSTACK-1465: We should pass array instead of a List for SearchCriteria.Op.IN as value.