Bug 2076 - Routing does not work unless node contains vms on all vlans (segIds)

The logic for determining whether or not entries should be added to table 70 was
not taking into consideration the fact that vms on non-local vlans are also needed.

The fix simply fixes the logic used to filter out L3 fwd entries.

Change-Id: I0b7836a8f267c6346c24dad0adae6af87471dd57
Signed-off-by: Flavio Fernandes <ffernand@redhat.com>