Update git submodules

* Update docs/submodules/functest from branch 'stable/danube'
  - Rename testcase_base to testcase

    It simply removes the useless suffix.

    Change-Id: Ib9a682b57d8f33518359d817a593bb3786577390
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>
    (cherry picked from commit 69e51470d8e9f51e02d5f0bd6e957c4e24c603c6)

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 5112760..f5b4588 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 5112760fe2ca1e4d31f368235c4aee87e7577e5f
+Subproject commit f5b4588ae8d59f1f1bd4ca4406419d1dc9da35df