Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Merge "Switch to public keystone endpoint"
  - Switch to public keystone endpoint

    It also reorders imports and removes dead code.

    Change-Id: I1e7bd03a4bc07df4705c9beed83a37a022ddbd52
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 8c11fb5..e38c497 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 8c11fb51544b020bc329129ba9c3503e84182c84
+Subproject commit e38c497a0ba3d062fca7f5e7bae9ca395005df34