Update git submodules

Update git submodules

* Update docs/submodules/dovetail from branch 'master'
  - Provide a list of check results files instead of one

    This patchs gives the ability to provide more than one check results
    file. Furthermore, it does not alter the behavior of the existing tests
    but prepares dovetail to be able to fetch information from many
    sources.

    Change-Id: I23cd23d2908ad6bdddd94b977813d0e81dc0c05a
    Signed-off-by: Stamatis Katsaounis <mokats@intracom-telecom.com>