Update git submodules

Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Merge "Add Rally scenarios for telemetry"
  - Add Rally scenarios for telemetry

    Ceilometer scenarios were added.

    Reasons for testcase blacklisting:
    - Deprecated ceilometer client used by Rally. This depends on the
      confuguration of the system, currently it seems to affect all
      installers.
    - A bug in ceilometer client (already fixed and merged in OpenStack
      repository).

    JIRA: FUNCTEST-849

    Change-Id: I0bd7e1e9817538165b7b9705bcec213d7d275359
    Signed-off-by: Martin Kulhavy <martin.kulhavy@nokia.com>