Update git submodules

* Update docs/submodules/sdnc/oam.git from branch 'master'
  to 798d2b1b0c822ff123adff07497fdde6a1b991d6
  - Merge "Adding required ietf YANG models to support OTN tunnel as part of SOTN NNI-based service creation."
  - Adding required ietf YANG models to support OTN tunnel as part of SOTN NNI-based service creation.

    Issue-ID: SDNC-900
    Signed-off-by: Hesam Rahimi <hesam.rahimi@huawei.com>
    Change-Id: I759c914392853fbbe4d886632b377d8bdf41da1b

diff --git a/docs/submodules/sdnc/oam.git b/docs/submodules/sdnc/oam.git
index 8352d56..798d2b1 160000 (submodule)
--- a/docs/submodules/sdnc/oam.git
+++ b/docs/submodules/sdnc/oam.git
@@ -1 +1 @@
-Subproject commit 8352d567e199ef1fa960e4473898b00e14b149d6
+Subproject commit 798d2b1b0c822ff123adff07497fdde6a1b991d6