Update git submodules

Update git submodules

* Update docs/submodules/sfc from branch 'master'
  to 79771cb83cc3443dd86b757d75bda17f25d34ae2
  - Add .coafile for linting, fix tox verify job

    The tox.ini file defines a Coala test env, and the JJB tox job template
    in global-jjb calls all test envs, so the Coala env was failing due to
    missing .coafile. Add a .coafile with sections for linting many of the
    types of files in SFC. All tests except Git commit message linting are
    disabled because there are violations in SFC that cause failures. The
    violations should be fixed and corresponding sections enabled to keep
    them fixed in different commits.

    Change-Id: Ib8f9b4a7d68bcad6d1c3b1fe2230e96b736ee12d
    Signed-off-by: Daniel Farrell <dfarrell@redhat.com>