Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to e53c2cbebcaf9eababa6ead8723cf62194146e51
  - Merge "improve error log scores"
  - improve error log scores

    Updated error code name to fix spelling
    Defaulted errorcode and errordesc to unknown when not provided
    Remove unused imports from nc orchestrator application
    Added defaulting of serviceName to error log

    Issue-ID: SO-2538
    Signed-off-by: Benjamin, Max (mb388a) <mb388a@att.com>
    Change-Id: I5ae960f728739e2528173b66484562742429416c