alarm-history cannot support start_timestamp and end_timestamp in query filed

[Liusheng]

If I use the following command in ceilometer CLI to get history of an alarm,it will raise an error.
ceilometer alarm-history -a 2656a970-5efe-4c11-b518-24c38f549316 -q start_timestamp=2014-03-04T09:56:07.270929

The traces in log file is:
http://paste.openstack.org/show/73212/

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/87534

[Mehdi Abaakouk (sileht)]

The request that should be work :

ceilometer alarm-history -a 2656a970-5efe-4c11-b518-24c38f549316 -q timestamp>=2014-03-04T09:56:07.270929

[Openstack Gerrit (openstack-gerrit)]

Fix proposed to branch: master
Review: https://review.openstack.org/90636

[Openstack Gerrit (openstack-gerrit)]

Fix proposed to branch: master
Review: https://review.openstack.org/92066

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/128856

[OpenStack Infra (hudson-openstack)]

Change abandoned by liusheng (<email address hidden>) on branch: master
Review: https://review.openstack.org/92066

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/128856
Committed: https://git.openstack.org/cgit/openstack/ceilometer/commit/?id=33065c16f6b7ffb1f3595a10559b395542e7e30d
Submitter: Jenkins
Branch: master

commit 33065c16f6b7ffb1f3595a10559b395542e7e30d
Author: liu-sheng <email address hidden>
Date: Thu Oct 16 17:02:49 2014 +0800

    Standardize timestamp fields of ceilometer API

    For currently, the timestamp in query fields is not unified, this
    patch standardizes the usage of timestamp query fileds:

    - unify the time query filed in API to *timestamp* supported only.
    - unify the time related fileds of filters to start_timestamp and
      end_timestamp to simplify the process logic.
    - improve the _query_to_kwargs method to give explicit presentation
      if user specifies unsupported query fields.

    Change-Id: Ic3ade312efa89edd01d2ee5ae31d341805b11f79
    Closes-bug: #1295104
    Closes-bug: #1291171