Update git submodules

* Update keystonemiddleware from branch 'master'
  to 44460934f87f771f5a4feb00cab7e28a921dc2d4
  - Merge "s3token: Stop loading deprecated options"
  - s3token: Stop loading deprecated options

    This is the first step to get rid of AuthTokenPlugin, which was
    deprecated long time ago, and removes usage of the deprecated plugin
    options from s3token.

    Change-Id: Ib7f89888fed4169be49722fe95a43bb6a2a0ea2b
    Signed-off-by: Takashi Kajinami <kajinamit@oss.nttdata.com>

diff --git a/keystonemiddleware b/keystonemiddleware
index 0a2df21501e1168ca051e87ae2661832cf72ca0e..44460934f87f771f5a4feb00cab7e28a921dc2d4 160000 (submodule)
--- a/keystonemiddleware
+++ b/keystonemiddleware
@@ -1 +1 @@
-Subproject commit 0a2df21501e1168ca051e87ae2661832cf72ca0e
+Subproject commit 44460934f87f771f5a4feb00cab7e28a921dc2d4