Updated git submodules

Project: sdnc/oam master 4a781d41043dd398b59de1639df5c060b59b920b

Merge "Fix add-apt-repository"

Fix add-apt-repository

When run from command line, add-apt-repository waits for user prompt
to continue.  Redirecting stdin to /dev/null allows installation to
proceed without prompt.

Change-Id: Ia646e775a3fcfba6100ffea05c48d6d6bc2f498d
Issue-ID: SDNC-288
Signed-off-by: Timoney, Dan (dt5972) <dt5972@att.com>

diff --git a/docs/submodules/sdnc/oam.git b/docs/submodules/sdnc/oam.git
index 798f877..4a781d4 160000 (submodule)
--- a/docs/submodules/sdnc/oam.git
+++ b/docs/submodules/sdnc/oam.git
@@ -1 +1 @@
-Subproject commit 798f8776ccd874ae3e4192b8e5c578fb70dbad74
+Subproject commit 4a781d41043dd398b59de1639df5c060b59b920b