Update git submodules

* Update charm-cinder from branch 'master'
  to e4d6ab230906f0bb48c890eb30c68f047c479aa0
  - Fix build

    Summary of changes:
    - Drop cliff
    - Add looseversion

    Signed-off-by: Felipe Reyes <felipe.reyes@canonical.com>
    Change-Id: If0c251869655563729de0f55756f34cf7a1d21d3

diff --git a/charm-cinder b/charm-cinder
index 185b503ca0ab9c82ecea620babb9bdaed40f4375..e4d6ab230906f0bb48c890eb30c68f047c479aa0 160000 (submodule)
--- a/charm-cinder
+++ b/charm-cinder
@@ -1 +1 @@
-Subproject commit 185b503ca0ab9c82ecea620babb9bdaed40f4375
+Subproject commit e4d6ab230906f0bb48c890eb30c68f047c479aa0