Update git submodules

* Update docs/submodules/sdnc/oam.git from branch 'master'
  to 2b38887a7cde529a01f15702358d4678e3d7b120
  - Dublin pnf DGs
    
    Adding DGs to support aai put for pnf
    
    Change-Id: I04d66be61be3b8d13daf1c14310ff75b24c687ba
    Issue-ID: SDNC-634
    Signed-off-by: Cheung, Pat (kc1472) <kc1472@att.com>
    
diff --git a/docs/submodules/sdnc/oam.git b/docs/submodules/sdnc/oam.git
index 8099c4a..2b38887 160000
--- a/docs/submodules/sdnc/oam.git
+++ b/docs/submodules/sdnc/oam.git
@@ -1 +1 @@
-Subproject commit 8099c4a748356dd67a3fddddc340950439575ad8
+Subproject commit 2b38887a7cde529a01f15702358d4678e3d7b120