restricting the version of docker to 1.9.x for vsphere support

for vsphere provider docker currently only supports 1.9.1 release.
The older versions of docker are failing on jessie due to issue https://github.com/docker/docker/issues/18793
and newer version 1.10.x is not properly tested.

cluster/saltbase/salt/docker/init.sls

@@ -125,9 +125,14 @@ cbr0:
     - require:
       - cmd: 'apt-update'
 
+# restricting docker version to 1.9. with older version of docker we are facing
+# issue https://github.com/docker/docker/issues/18793.
+# newer version of docker 1.10.0 is not well tested yet.
+# full comments: https://github.com/kubernetes/kubernetes/pull/20851
 docker-engine:
    pkg:
      - installed
+     - version: 1.9.*
      - require:
        - file: /etc/apt/sources.list.d/docker.list
 docker: