Update git submodules

* Update docs/submodules/functest from branch 'stable/danube'
  - Merge "Release notes for Danube 2.0" into stable/danube
  - Release notes for Danube 2.0

    Change-Id: Ibe121dad771f0df36ffa15ec13d637b835cf09a8
    Signed-off-by: jose.lausuch <jose.lausuch@ericsson.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index b69ce13..b17e3b9 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit b69ce133a5c16a5d9e9a55e24df5aa75eb05c8ea
+Subproject commit b17e3b96876772149846860eb17ddf83e1f13f0c