Update git submodules

* Update docs/submodules/container4nfv from branch 'master'
  - Merge "rebase onap oom to beijing release"
  - rebase onap oom to beijing release

    Change-Id: I9f3d755764a194068c2f3f128eb6d0861fcda555
    Signed-off-by: Guo Ruijing <ruijing.guo@intel.com>

diff --git a/docs/submodules/container4nfv b/docs/submodules/container4nfv
index 349aae4..20518dc 160000 (submodule)
--- a/docs/submodules/container4nfv
+++ b/docs/submodules/container4nfv
@@ -1 +1 @@
-Subproject commit 349aae43a3538b3dec63b41aded13895bc9770a4
+Subproject commit 20518dc93167aff1c83bf2995acc3e75e5a02c3d