VMs on tennant vlan network not getting an IP when spwaned after

VMs on tennant vlan network not getting an IP when spwaned after
the networks are added to the router.

The router port elandpnlist didn't have a state. So when the first port
is router port in the list, the elan flows fails.

Check is added to skip router port while checking if a port is the first
one in the list.

NETVIRT-1208 An Instance doesn't get an IP after when a network is added
to a router

Change-Id: I25ea20759eefc3043f1616e7907b0c6916fe90e5
Signed-off-by: Aswin Suryanarayanan <asuryana@redhat.com>