Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Merge "SNAPS tests now support offline testing."
  - SNAPS tests now support offline testing.

    Images by type (cirros, centos, ubuntu) can now have the download URL be
    overridden, told to leverage a local file, or have custom configuration
    when using the snaps.openstack.tests.openstack_tests.py image settings
    helper functions.

    JIRA: FUNCTEST-809

    Change-Id: I790094a7a26eb5a55f53d6e875c658dc5e7ac2f9
    Signed-off-by: spisarski <s.pisarski@cablelabs.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 06fd297..fbc676b 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 06fd297de11e9dd061fe001502f66f139f054098
+Subproject commit fbc676b2bcf63382a39c5b54d47c608a20a8cfea