Update git submodules

* Update docs/submodules/compass4nfv from branch 'master'
  - Set default openstack version to Ocata

    Default value of openstack version variable is
    still newton which cause error when using this
    default value in k8s scenario

    Change-Id: I8e89e60f03a0dbf0263b0fef85f80ccb4a32efae
    Signed-off-by: Harry Huang <huangxiangyu5@huawei.com>

diff --git a/docs/submodules/compass4nfv b/docs/submodules/compass4nfv
index de2ba2c..b1dfbcd 160000 (submodule)
--- a/docs/submodules/compass4nfv
+++ b/docs/submodules/compass4nfv
@@ -1 +1 @@
-Subproject commit de2ba2c73205c2580f87a73fe7974ae8a8368093
+Subproject commit b1dfbcd4eff49e5c05a087263140d76a59d7a731