Update git submodules

Update git submodules

* Update docs/submodules/sdnc/oam.git from branch 'master'
  to e151fc707c1426e2c8563726a8b396de0e0b65c9
  - Fixed SDWAN bandwidth change issue

    1. update svc-action not handle in vf-module-topology-operation DG
    causing bandwidth change failure.
    2.sdwan-bandwidth-policy-change node link to get ESR missing so could not get controller IP
    3.Update code to send request based on IPMode

    Change-Id: I837f98c9199ddb34644e8c5af1679598ac123fc4
    Issue-ID: SDNC-767
    Signed-off-by: shashikanth.vh <shashikanth.vh@huawei.com>