Updated git submodules

Updated git submodules

Project: netvirt master 0fff130ba2c2a2815b53e9da13b748c708b3429e

Bug 8412 - NPE while adding and removing elanmacentry

1. While advertising RT2 route prefix is Optional, hence added a safer
null check. if prefix is not present, still go ahead and advertise RT2
route
2. During withdraw if prefix is not present, return with error log.
3. Remove the elanName null check as its never null.

Change-Id: I3009bb9d19f3413d448031ff47771a986ef10746
Signed-off-by: Janki <jchhatba@redhat.com>