Update git submodules

* Update docs/submodules/sdnc/oam.git from branch 'master'
  to 83413b8058da81bd163b1c4270f4851cbbde0161
  - Fix SDWAN lan-port-config ip-subnets creation

    SDWAN lan-port ip-subnets creation called after
    attaching site to VPN to resolve invalid-vpn
    error from controller

    Change-Id: Iec9d8a1945e3ddd992aa33e5f96b1ab9ce1dfd88
    Issue-ID: SDNC-659
    Signed-off-by: Prakash.E <prakash.e@huawei.com>

diff --git a/docs/submodules/sdnc/oam.git b/docs/submodules/sdnc/oam.git
index 570153b..83413b8 160000 (submodule)
--- a/docs/submodules/sdnc/oam.git
+++ b/docs/submodules/sdnc/oam.git
@@ -1 +1 @@
-Subproject commit 570153b334e64246b2eff459d18d6eac6df70e22
+Subproject commit 83413b8058da81bd163b1c4270f4851cbbde0161