Update git submodules

* Update docs/submodules/compass4nfv from branch 'stable/euphrates'
  - fix yaml install

    move yaml install out of if block to
    install pyyaml whenever apt packages
    is installed

    Change-Id: Icbad66e0d8070afcb183c31af4759443bf0cf7f1
    Signed-off-by: Harry Huang <huangxiangyu5@huawei.com>
    (cherry picked from commit fb952b8c4cb4a47ad33cf7f7c3a06b83954343a2)

diff --git a/docs/submodules/compass4nfv b/docs/submodules/compass4nfv
index 0337ca2..6905f82 160000 (submodule)
--- a/docs/submodules/compass4nfv
+++ b/docs/submodules/compass4nfv
@@ -1 +1 @@
-Subproject commit 0337ca28259e0afe67778c778c1cc8697cd93cec
+Subproject commit 6905f82c89d8d9825494bb10959d61e5f7053451