Ensure compatibility with older docker version.

docker_dev_start.py

@@ -293,5 +293,5 @@
         logging.debug('Using data volume %s', data_volume_name)
         volume = getVolume(docker_client, data_volume_name)
         # make sure the permission in the volume are correct
-        mount_opts = 'source={},target=/mnt/data'.format(data_volume_name)
+        mount_opts = '{}:/mnt/data'.format(data_volume_name)
         # TODO replace by something cleaner if possible
@@ -297,5 +297,5 @@
         # TODO replace by something cleaner if possible
-        call(['docker', 'run', '--rm', '--mount', mount_opts, 'busybox', 'chmod', '777', '/mnt/data'])
+        call(['docker', 'run', '--rm', '-v', mount_opts, 'busybox', 'chmod', '777', '/mnt/data'])
         binds.append('{}:/mnt/data'.format(data_volume_name))
         arg.append('--data-dir /mnt/data')
     else: