Update git submodules

Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Bypass Cloudify tenancy issues

    It creates a second user to bypass possible bugs and correctly
    exits on failure if it cannot connect to manager via ssh.

    It leverages on the _member_ user as much as possible.
    It also switches all flavor names to avoid conflicts.

    It also increases debug logs.

    Change-Id: I59cb071248b5ae50952b9f16eb29f7be3f3644ae
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>