Update git submodules

Update git submodules

* Update docs/submodules/ccsdk/distribution.git from branch 'master'
  to 5d012b346c6a6b9b87c81da720094afad5282127
  - SDNR OOCPCI DG Updates for RANSIM  Netconf Mount

    RAN Simulator leverages Netconf servers to simulate DU's in the  RAN
    and DG's that reconfigure YANG tree leaf nodes for closed loop
    automation need to also support RESTCONF API calls for YANG tree
    leaf nodes behind the mount points. Modified existing DG's and
    DG properties file

    Issue-ID: CCSDK-1398
    Signed-off-by: SandeepLinux <sandeeplinux1068@gmail.com>
    Change-Id: I2875860115d6ee07edaa39bfcb2e28c01ac9040f