Update git submodules

Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Live migration support determination in rally

    Live migration test cases were excluded if tempest was not executed
    before rally since tempest config file is created during the execution
    of tempest.

    Remove the dependency to config file and define the support based on
    the number of computes as done in tempest.

    Change-Id: I57c18b7c57e6a4bc8bfbdfb4beb5f8d67c6269c4
    Signed-off-by: Juha Kosonen <juha.kosonen@nokia.com>