Update git submodules

* Update docs/submodules/functest from branch 'stable/danube'
  - Fix VIM onboarding and ims deployment

    VIM onboarding: check for API version of OpenStack -> support of v2 and v3
    ims deployment: fix userdata in order to wait for EMS registration

    Change-Id: Id0932232ddb1f1163ef3c37460bc88b71b9c0bdd
    Signed-off-by: Michael Pauls <michael.pauls@fokus.fraunhofer.de>
    (cherry picked from commit 0cbe545a4ebda5b37b682b46d849198648a7efe1)

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 9a146d8..aaf94ef 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 9a146d8b98e19c1aa2f4baec3a540d5eec8e8b34
+Subproject commit aaf94ef8a8399b7f480feae5814f3897ca7fc0a3