meter_name is not optional parameter when creating sample

[Liusheng]

When creating sample with ceilometer CLI,like this:
ceilometer sample-create -r af0e4b67-a79f-48e5-ac5d-12f8e8c114d5 --meter-type gauge --meter-unit instance --sample-volume 10
The result is "'counter_name'",the parameter "meter_name"(i.e.counter_name) is required,but it is not in the help messages of "ceilometer sample-create".

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/66534

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/66534
Committed: https://git.openstack.org/cgit/openstack/python-ceilometerclient/commit/?id=4c42f5052678539648a1051a526b82ab95269a2b
Submitter: Jenkins
Branch: master

commit 4c42f5052678539648a1051a526b82ab95269a2b
Author: ls1175 <email address hidden>
Date: Tue Jan 14 18:26:34 2014 +0800

    fix optional parameter of creating sample

    When creating sample without parameter "meter_name" in ceilometer CLI,
    The result is 'counter_name' ,the parameter "meter_name"(i.e.counter_name)
    isrequired,but it is not in the help messages of "ceilometer sample-create".

    Change-Id: I17ee19354b51cd5095677438359d036783d82b15
    Closes-bug: #1267378