Comment 7 for bug 1480442

Reviewed: https://review.openstack.org/208745
Committed: https://git.openstack.org/cgit/openstack/ceilometer/commit/?id=3ec58ba18e907b277903927e0c98deaa9c42031d
Submitter: Jenkins
Branch: master

commit 3ec58ba18e907b277903927e0c98deaa9c42031d
Author: gordon chung <email address hidden>
Date: Mon Aug 3 20:54:09 2015 -0400

    group pollsters by interval

    there was a regression in code which led to discrete polling tasks
    being created per pipeline. while logical, this meant that the cache
    between tasks with same interval never got shared and therefore
    duplicate calls were made.

    Change-Id: I72876f61a73f4ca2f4ca48aebb1489ce7ebb702e
    Related-Bug: #1480442