Update git submodules

Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to 8d19ead3b24e7ee654bb467565ad7e6b94ddc671
  - Merge "Created external task utils in a common location"
  - Created external task utils in a common location

    Created external task utils in a common location then refactored
    external task to use these common utils
    Updated junit errors and failures in openstack
    Removed env param and updated unit test with class
    Remove env file from parm in unit test class
    Match argu to match class abstract to con.
    removed implementation within anonymous class

    Issue-ID: SO-2291
    Signed-off-by: Benjamin, Max (mb388a) <mb388a@att.com>
    Change-Id: I47c2850d750cbfe7ef67e2396fcb46db43e3cb97