Update git submodules

* Update docs/submodules/sdnc/oam.git from branch 'elalto'
  to 51fb6f9b2bdb459a27f919bfe2b987daa35a566c
  - Release 1.7.6 maven artifacts
    
    Release maven artifacts for version 1.7.6 (SDNC-961 fix)
    
    Change-Id: I3cdb05e9357615fae931cc45c8a5f12c3ea9d326
    Issue-ID: SDNC-961
    Signed-off-by: Timoney, Dan (dt5972) <dtimoney@att.com>
    
diff --git a/docs/submodules/sdnc/oam.git b/docs/submodules/sdnc/oam.git
index 60b84d2..51fb6f9 160000
--- a/docs/submodules/sdnc/oam.git
+++ b/docs/submodules/sdnc/oam.git
@@ -1 +1 @@
-Subproject commit 60b84d28f79ad82a827c70da68bf8b58ac945fd8
+Subproject commit 51fb6f9b2bdb459a27f919bfe2b987daa35a566c