Update git submodules

Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to 7ff9326295fe389e5cfeb332291ec7e46da2f20e
  - Merge "health check now entirely config based"
  - health check now entirely config based

    health check now entirely config based
    api handler now lists itself as an endpoint
    updated robot test to verify new format
    fixed formatting issues with modified files
    updated test case to reflect new statuses
    fixed duplicate bean issue with converter
    ignore unit test that never worked
    added missing class to context configuration
    removed extraneous spaces from robot file
    update robot files as well as fix compile issues
    config format must be correct on startup

    Issue-ID: SO-2216
    Signed-off-by: Benjamin, Max (mb388a) <mb388a@att.com>
    Change-Id: I86770922c7b7f36e4a4d59615f7336cda7cbe629