Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Check app workload in juju_epc

    It avoids interpreting rsync errors in case of deployment failures.
    Mysql is still unchecked.

    Change-Id: I01b4470b86637d0fc322c422f05240a928305158
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index c789cca..b5a9b04 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit c789cca4a6e9afefba0c1622d49a181dd35437f7
+Subproject commit b5a9b04871868633f5c92005b7665bfb76ee6eec