Update git submodules

* Update docs/submodules/functest from branch 'stable/euphrates'
  - Add icmp rules for clearwaterims case

    icmp rules must be enabled since a ping is used internally
    to check that other components are up and reachable

    Change-Id: I1ae3c301f30455c57193ddfe1757e971f5612c18
    Signed-off-by: Michael Pauls <michael.pauls@fokus.fraunhofer.de>
    (cherry picked from commit 4a27c90843abd3a8d002e37f0f9f22307f2ec9fc)

diff --git a/docs/submodules/functest b/docs/submodules/functest
index b7f390c..625f8ba 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit b7f390c91994cbcebac60e55f32a543cd4d46c1c
+Subproject commit 625f8ba769a6f9c897fa4f2dd94054edc7073540