Update git submodules

* Update docs/submodules/netvirt from branch 'stable/carbon'
  to c2267d97cd32098d22839d7e12d5de4d39b09c7e
  - NETVIRT-984: Fix of issue that l2gw connection creation failed in L2GW HA environment.

    Issue:
      Exception occurred in l2gw connection creation and caused OVSDB
      transaction is not executed to the end in L2GW HA environment.

    Cause:
      "replication-mode" is not set in HWVTEP logical-switches entry in
      network topology config DS. And this caused the
      NoSuchElementException in l2gw connection creation.

    Fix:
      Fix this by set replication-mode in the above entry.

    Change-Id: I022e493abdbd20d2279540be790bf018c8dc2032
    Signed-off-by: kaoru sueda <k-sueda@zj.nes.jp.nec.com>

diff --git a/docs/submodules/netvirt b/docs/submodules/netvirt
index a2d04f079b4da27250271263ae564a6bad1e047d..c2267d97cd32098d22839d7e12d5de4d39b09c7e 160000 (submodule)
--- a/docs/submodules/netvirt
+++ b/docs/submodules/netvirt
@@ -1 +1 @@
-Subproject commit a2d04f079b4da27250271263ae564a6bad1e047d
+Subproject commit c2267d97cd32098d22839d7e12d5de4d39b09c7e