Update git submodules

* Update docs/submodules/container4nfv from branch 'master'
  - remove trailing space

    Change-Id: I36903535289c51346deea49791fd4a0d6e223a18
    Signed-off-by: Guo Ruijing <ruijing.guo@intel.com>

diff --git a/docs/submodules/container4nfv b/docs/submodules/container4nfv
index b5f2330..abd05b1 160000 (submodule)
--- a/docs/submodules/container4nfv
+++ b/docs/submodules/container4nfv
@@ -1 +1 @@
-Subproject commit b5f2330198ba9eb581972f1f394f7cf8c3ed2db8
+Subproject commit abd05b1cb568c7cb9a406752b0f3d0daa0653b34