Update git submodules

* Update docs/submodules/functest from branch 'stable/danube'
  - Release notes for Danube.3.0

    Change-Id: I528b4ef11b5957856c36c0f18c0aa28a38d450a4
    Signed-off-by: jose.lausuch <jose.lausuch@ericsson.com>
    (cherry picked from commit 40303d3342303bb831bf989e530c4c39dea7ff46)

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 3b87204..4c05eb1 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 3b87204813a4134906131ce8c0fc24a4c54bae71
+Subproject commit 4c05eb15bd85d8356be17e61d58179fef213c8bc