Update git submodules

Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to f31615ead318cdc18e31dcfaef993ae5362992c2
  - Merge "mso to add tenant name and product family name to"
  - mso to add tenant name and product family name to

    Add productFamilyName and tenantName to requests DB and request status
    results.
    Add more JUnits, fix JUnit schema files.
    Robot test adjustments to create service object in AAI when needed.
    Update robot tests to verify presence of productFamilyName and
    tenantName in return data.
    Add missing return of retrieved productFamilyName in robot test
    Add checking of tenantName on return to another robot test.
    Update archiving of infra requests for tenantName and productFamilyName.

    Issue-ID: SO-2674
    Signed-off-by: Benjamin, Max (mb388a) <mb388a@att.com>
    Change-Id: I2950b7783ee863dc59360c6124f38bee89cb2140