Update git submodules

* Update docs/submodules/compass4nfv from branch 'stable/danube'
  - onos sfc for danbue

    JIRA: COMPASS-483

    Install ovs-common and ovs-dkms.
    Upgrade the ONOS SFC driver and update the sfc related comfigurations.

    Change-Id: I47c7fe5cd2cb83517da18c36820dba05522c3835
    Signed-off-by: Yifei Xue <xueyifei@huawei.com>

diff --git a/docs/submodules/compass4nfv b/docs/submodules/compass4nfv
index b928c4f..02603a0 160000 (submodule)
--- a/docs/submodules/compass4nfv
+++ b/docs/submodules/compass4nfv
@@ -1 +1 @@
-Subproject commit b928c4f50eea276aacebdeb875500e99915e9c92
+Subproject commit 02603a05c4d3fe59876030dc914cab019193d4e6