Update git submodules

* Update docs/submodules/compass4nfv from branch 'master'
  - Add SDN controller's IP in openrc file for functest

    JIRA: COMPASS-590

    From the time being, Functest ODL testcase calculates ODL ip thanks to Neutron IP.
    It should be calculated on Installer side (releng jobs) and set via SDN_CONTROLLER_IP in Functest env instead.
    https://git.opnfv.org/functest/tree/functest/opnfv_tests/sdn/odl/odl.py#n185
    It ensures that Functest can rely on SDN_CONTROLLER_IP in all cases (OpenStack end users included)

    Change-Id: I01c0af952dbb21592aa973daaea3845346dc833f
    Signed-off-by: Yifei Xue <xueyifei@huawei.com>

diff --git a/docs/submodules/compass4nfv b/docs/submodules/compass4nfv
index 93cd2cd..cb4d867 160000 (submodule)
--- a/docs/submodules/compass4nfv
+++ b/docs/submodules/compass4nfv
@@ -1 +1 @@
-Subproject commit 93cd2cd6f456bc95ceda1f4817fffa88feb74129
+Subproject commit cb4d8671693d27b26de34852795782d28046117a