Update git submodules

Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to 4c81727a226d80c4ac07df61302dca3540f507d0
  - Merge "Fix rollback for ConfigAssignBB"
  - Fix rollback for ConfigAssignBB

    Issue-ID: SO-2266

    Signed-off-by: Munir Ahmad <munir.ahmad@bell.ca>
    Change-Id: Iff2faa9f9b919818c4a5f98a62ec2a66ee7589e4

  - update the typo of the issue number

    Issue-ID: SO-1742

    Signed-off-by: seshukm <seshu.kumar.m@huawei.com>
    Change-Id: I2eaac14c3e547a157aa7385ed1b40b296dd5d65f

  - update modularity details

    Issue-ID: SO-2010

    Signed-off-by: seshukm <seshu.kumar.m@huawei.com>
    Change-Id: Ie69578e566d6cb3ce8d3c3926bf11939a413b5a4