Update git submodules

* Update docs/submodules/functest from branch 'stable/danube'
  - Merge "Change api version" into stable/danube
  - Change api version

    The api_version had full API url instead of just the version.

    Change-Id: I78b39ea5d39e1ffab54d2bca41df96aadd47ac86
    Signed-off-by: Dimitri Mazmanov <dimitri.mazmanov@ericsson.com>
    (cherry picked from commit 3fb0175dab6d60af2fe40274fab19abf3ea6162f)

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 3a44ca9..ff8ecc1 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 3a44ca9956c6abb241d03392a03701bab321dd2b
+Subproject commit ff8ecc1fa24a81a039de8ea776c0db68dfee37fb