Update git submodules

Update git submodules

* Update docs/submodules/snaps from branch 'master'
  - Merge "Added ability to add a user to a role."
  - Added ability to add a user to a role.

    This functionality was requested as the SNAPS-OO integration tests
    currently have the ability to run these tests in custom projects with
    custom users and certain OpenStack installations are not allowing
    some of the integration tests functions unless the new user has been
    added to the 'admin' role.

    Change-Id: I255cfa089a14bbcb434a6cd33b2a1dfae66206b5
    Signed-off-by: spisarski <s.pisarski@cablelabs.com>