Update git submodules

Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to 626b8f2399043c35d3bcb86e1d1c6142e2e0e327
  - fix keypair conflict issue in openstack adapter

    Fix wiremock stubs to return proper data and url
    Fix copyright header issue on unit test file
    Fix keypair issue, clean up unit tests and logging
    Fix issues found in unit testing, update data
    Fix broken Unit tests that used invalid data
    Continue Refactor to support keypair failure scenario
    Update logic for when to auto delete a stuck keypair

    Change-Id: Ice5256cf0381a3b46d1c442907c0f321a1c0d006
    Issue-ID: SO-1897
    Signed-off-by: Benjamin, Max (mb388a) <mb388a@us.att.com>