Update git submodules

Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to 7cfae9f008deb9da1b7241fff48502bf86944341
  - Merge "Security updates for maven dependencies"
  - Security updates for maven dependencies

    Update commons-collections version to 3.2.2.
    Updated distribution client version to 1.4.0.
    Update commons-fileupload to version 1.4.
    Update commons-codec to version 1.12.

    Change-Id: I4ab794e3aef7300c30088e5197092fd30231c4af
    Issue-ID: SO-2043
    Signed-off-by: Benjamin, Max (mb388a) <mb388a@us.att.com>