Update git submodules

* Update docs/submodules/sdnc/oam.git from branch 'master'
  to f515a8831e0036414d69d73030e871dec88180f8
  - NNI-based Service creation DG bug fixes (uni, l2vpn, and underlay resources).
    
    - This is needed for F release
    
    Issue-ID: SDNC-1184
    Signed-off-by: Hesam Rahimi <hesam.rahimi@huawei.com>
    Change-Id: Ib35d7a70e862c6068d9e3edc10f7d80ba5764e6a
    
1 file changed