Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Add support for Rally OpenStack CI test cases

    Include Neutron rally-jobs.

    Change-Id: Ic1122962bd7d876d179729640a8a321bc36442d8
    Signed-off-by: Juha Kosonen <juha.kosonen@nokia.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 9b941ea..5d54a53 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 9b941ea58c60827d563d266f7dedd0d95de3ca93
+Subproject commit 5d54a533d25a989dc64a2789788ff2f2fd6ad5c6