Update git submodules

* Update docs/submodules/oom.git from branch 'master'
  to 4b81b5a6a5c420121c27fe5ff3f54cfcc86a6132
  - integrate artifact broker into multicloud plugins

    add config.json for each multicloud plugin
    update deployment to add it as sidecar
    update the values.yaml of multicloud to store image name
    remove the hardcode namespace
    fix typo and use 1.3.1 image tag

    Change-Id: I6cc9e381ea655b1d75760b013d2be693b0c0575c
    Issue-ID: MULTICLOUD-597
    Signed-off-by: liboNet <libo.zhu@intel.com>

diff --git a/docs/submodules/oom.git b/docs/submodules/oom.git
index 6e520f1..4b81b5a 160000 (submodule)
--- a/docs/submodules/oom.git
+++ b/docs/submodules/oom.git
@@ -1 +1 @@
-Subproject commit 6e520f189fbd1cfab2359763e454eff07bbc68a6
+Subproject commit 4b81b5a6a5c420121c27fe5ff3f54cfcc86a6132