Update git submodules

* Update docs/submodules/sdnc/oam.git from branch 'master'
  to 9b57e7af120f38f716bc5a8526dfd32cec4a87fa
  - Carry forward GRA async fixes

    Carry forward fixes to GENERIC-RESOURCE-API async flow made late
    in El Alto to Frankfurt.  It appears that some changes were
    not cherry picked, so fixing that by submitting the final El Alto
    version of the impacted directed graphs.

    Change-Id: I518328669124a393383ef65988a5313632e8634e
    Issue-ID: SDNC-1017
    Signed-off-by: Dan Timoney <dtimoney@att.com>

diff --git a/docs/submodules/sdnc/oam.git b/docs/submodules/sdnc/oam.git
index 78a1f2e..9b57e7a 160000 (submodule)
--- a/docs/submodules/sdnc/oam.git
+++ b/docs/submodules/sdnc/oam.git
@@ -1 +1 @@
-Subproject commit 78a1f2ec89fcbf01e6bf0d28128820b3a88818bf
+Subproject commit 9b57e7af120f38f716bc5a8526dfd32cec4a87fa