Update git submodules

* Update docs/submodules/sdnc/oam.git from branch 'master'
  to 72312368696418d022cfa12d35f01f4c55d4ed66
  - Merge "Add trunk_network_indicator to NETWORK_MODEL tbl"
  - Add trunk_network_indicator to NETWORK_MODEL tbl
    
    Change-Id: Ieddd6b82f774b91d00f6daacf2d1d80fb570f81a
    Issue-ID: SDNC-684
    Signed-off-by: Yang Xu <yang.xu3@huawei.com>
    
diff --git a/docs/submodules/sdnc/oam.git b/docs/submodules/sdnc/oam.git
index e75b4f9..7231236 160000
--- a/docs/submodules/sdnc/oam.git
+++ b/docs/submodules/sdnc/oam.git
@@ -1 +1 @@
-Subproject commit e75b4f974c0d5f9ea54436b01aa85a93318e7199
+Subproject commit 72312368696418d022cfa12d35f01f4c55d4ed66