Update git submodules

Update git submodules

* Update cinder from branch 'master'
  to cf7a00aba514805afe77380fd5690ce246976ce8
  - Merge "tests: Ensure all APIs have a request body schema"
  - tests: Ensure all APIs have a request body schema

    The idea here is to test that we are doing schema validation against
    all routes that accept a request body (i.e. POST, PUT, PATCH). We can
    use these schemas down the line to generate OpenAPI docs like all the
    cool kids do.

    Change-Id: I666ac1c151de9bf1b4570390d74809afb014f4a2
    Signed-off-by: Stephen Finucane <stephenfin@redhat.com>