Update python-ceilometerclient lower bound to 1.0.6

To take account of the latest release:

  https://pypi.python.org/pypi/python-ceilometerclient/1.0.6

Nothing too controversial in this release:

  $ git fetch ; git tag -n15 -l 1.0.6

  1.0.6           python-ceilometerclient 1.0.6

    Includes the following changes:

         * Add support for new alarm-history command
         * Use standard CLI object-verb ordering for alarm-{g|s}set-state
         * Fix shell.do_alarm_get_state to get as opposed to set
         * Updated from global requirements
         * Allow to update an alarm partially
         * Added support to --os-cacert
         * Help messages: specify which options are required
         * Improve the CM shell client alarm visualisation

Change-Id: Idc3aa76a59258ddc47a7fdbeea69a13cf0597b97
Merge "Update python-ceilometerclient lower bound to 1.0.6"