Update git submodules

Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Merge "New python script to check openstack deployment"
  - New python script to check openstack deployment

    This is a crucial part of functest env prepare.
    The former check_os.sh is missing some error
    control and is sometimes trying to connect to an
    empty endpoint if the sed/awk commands were wrong.
    This python script is more robust in that sense.
    You can see an example of execution in [1].

    [1] http://paste.openstack.org/raw/614852/

    Change-Id: I622befa13b58d2d31a08d307befb12a2be28fe4d
    Signed-off-by: jose.lausuch <jose.lausuch@ericsson.com>