Update git submodules

Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to 980aa7b6d011d4760a82033189a0b116fedb9613
  - Merge "add retry sequence levels"
  - add retry sequence levels

    Added retry sequence levels so that the different services can specify
    their desire.
    Updated to be medium and added to be long sequence in audit.
    Change retry level to be final and changed default constructor to
    private
    Changed default constructor to public so its visible.
    Updated unit test to reflect change and get verify job to pass
    Added and updated the unit test for add graph

    Issue-ID: SO-2649
    Signed-off-by: Benjamin, Max (mb388a) <mb388a@att.com>
    Change-Id: I981b90a5dbb1dca5354fba37589b26dabbfc0b0e