Update git submodules

* Update docs/submodules/sdnc/oam.git from branch 'master'
  to a57df931e3d7fda65f78ad503614eabd8a51c691
  - SDNC-555: Install ODL features for NETCONF

    Bug Fix:
    SDNC install script should enable all ODL
    features required for NETCONF support.
    Features:
    odl-netconf-clustered-topology

    Issue-ID: SDNC-555
    Change-Id: I41db875e769523ad578da3bd92800fe18460b93d
    Signed-off-by: DarraghEgan <darragh.egan@est.tech>

diff --git a/docs/submodules/sdnc/oam.git b/docs/submodules/sdnc/oam.git
index 1b34b6d..a57df93 160000 (submodule)
--- a/docs/submodules/sdnc/oam.git
+++ b/docs/submodules/sdnc/oam.git
@@ -1 +1 @@
-Subproject commit 1b34b6dd37c6fc1963fe66b00a1ee91344f65ef6
+Subproject commit a57df931e3d7fda65f78ad503614eabd8a51c691