Update git submodules

Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to 8d23a63762dcd0d435463fa25c64f146d52dc981
  - Merge "initial commit of testing of grabbing cvnfc cust"
  - initial commit of testing of grabbing cvnfc cust

    initial commit of testing of grabbing cvnfc cust
    Update SQL so it properly inserts test data
    remove unnecessary test in mso catalog db
    updated tosca resource installer to use list not set
    fixed compilation issue in asdc rest interface test

    Issue-ID: SO-2769
    Signed-off-by: Benjamin, Max (mb388a) <mb388a@att.com>
    Change-Id: I9c6e7b6cbb96d9f395903a5a54b5af567eba62f8