Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Merge "Add Stor4NFV in upper-constraints.txt"
  - Add Stor4NFV in upper-constraints.txt

    This centralized file is reused by functest-kubernetes.

    Change-Id: Id0d9d4bb4be4368ee8181f73e8c5626414d6291d
    Signed-off-by: Qiaowei Ren <qiaowei.ren@intel.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 19f8aad..e69241b 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 19f8aadcf8a08141e9cedc84f4720dcd806355d3
+Subproject commit e69241b0ad7f4a2babc3bd0c36fd462cd0fed4c7