Update git submodules

* Update docs/submodules/functest from branch 'stable/danube'
  - Merge "Clean up Tempest blacklist" into stable/danube
  - Clean up Tempest blacklist

    This list has been generated in Colorado and there are
    some scenarios that are deprecated and there is no
    need to list them here.

    Change-Id: I62a30b5026ed1df65ebdb7a68a6acf3364469865
    Signed-off-by: jose.lausuch <jose.lausuch@ericsson.com>
    (cherry picked from commit 69de5300f0a5b75aed99a24a809f852498dc0695)

diff --git a/docs/submodules/functest b/docs/submodules/functest
index c11a646..e4ef989 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit c11a646f26086b4cfdf23c73ee6b3991c73c223e
+Subproject commit e4ef989e04ccb6ca76235f70fb1886caf5c40a24