Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Implement connection_check via shade too

    SNAPS connection_check tests are merged into api_check.
    It would ease debugging deployment as well [1]

    [1] https://build.opnfv.org/ci/view/functest/job/functest-apex-baremetal-daily-master/127/console

    Change-Id: I30254a46c3dc6874881d687e36903c6b7878d63d
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index e905fbe..0503756 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit e905fbe2253bf43da2661c3a9e67429e0292993a
+Subproject commit 0503756fa4584e82081fb44b9133d2564d77105b