Comment 8 for bug 1480442

Reviewed: https://review.openstack.org/209160
Committed: https://git.openstack.org/cgit/openstack/ceilometer/commit/?id=ca1f65bcb114819abd06fbc25006e39b8875ac7a
Submitter: Jenkins
Branch: master

commit ca1f65bcb114819abd06fbc25006e39b8875ac7a
Author: gordon chung <email address hidden>
Date: Tue Aug 4 12:16:02 2015 -0400

    add poll history to avoid duplicate samples

    this is a patch until we properly separate polling logic. this
    patch adds history so if a resource is defined in separate pipelines
    it will only be processed in one. by doing this, we send only a
    single copy of each sample and it can be processed appropriately
    by the notification agent

    this removes duplication check as it is covered by poll history and
    removes the pipeline references in polling.

    Change-Id: I9c1d3e25740fff5281d796c7bfea2f0e105bb5c5
    Closes-Bug: #1480442