Update git submodules

Update git submodules

* Update docs/submodules/sdnc/oam.git from branch 'dublin'
  to d4af847ee2c665526cba27ed068d57c9d54e958f
  - Merge "SDNC-759: Update installScript.py" into dublin
  - SDNC-759: Update installScript.py

    Bug Fix:
    In installScript.py public keys were restricting
    the xNF cert setup.
    Script updated so that public keys for each
    xNF are not required.

    Issue-ID: SDNC-759
    Change-Id: I975be1f73a9b95d6d7620e61ff43b7f1af5b5b6c
    Signed-off-by: DarraghEgan <darragh.egan@est.tech>
    (cherry picked from commit 371ee58ccabb526a45ebfbd0acebb4b76ac888f4)