Update git submodules

* Update docs/submodules/compass4nfv from branch 'stable/danube'
  - Change the BMC password of barematel POD

    For security, we change the password to Opnfv@pod

    Change-Id: Ica563ab897123a6b45d1f97284071efa4a70461b
    Signed-off-by: wutianwei <wutianwei1@huawei.com>

diff --git a/docs/submodules/compass4nfv b/docs/submodules/compass4nfv
index c2cc1f5..8409034 160000 (submodule)
--- a/docs/submodules/compass4nfv
+++ b/docs/submodules/compass4nfv
@@ -1 +1 @@
-Subproject commit c2cc1f592fa352dda5ea6600c9871659bfcfd2ef
+Subproject commit 8409034cb44eda4c814aa2fc035577d963ed0f3c