Updated git submodules

Project: netvirt master 28ee731e346e88e006ff95147ec062062d7d6a44

Bug 9030 - port and port security groups cannot be null

Fixing an issue caused due to the removal of null check bindAcl in [1].
Which could cause bind service being called for port which has SG
disabled.

[1]https://git.opendaylight.org/gerrit/#/c/62346

Change-Id: Icd9e75f7b0bbfa448e49aa9109c8ea562a48be27
Signed-off-by: Aswin Suryanarayanan <asuryana@redhat.com>

diff --git a/docs/submodules/netvirt b/docs/submodules/netvirt
index 9ae997e631280d7191ada2934eda4d96108a8556..28ee731e346e88e006ff95147ec062062d7d6a44 160000 (submodule)
--- a/docs/submodules/netvirt
+++ b/docs/submodules/netvirt
@@ -1 +1 @@
-Subproject commit 9ae997e631280d7191ada2934eda4d96108a8556
+Subproject commit 28ee731e346e88e006ff95147ec062062d7d6a44