Fuel-stats http handler for export statistics to the csv

[Alexander Kislitsky]

We need to have http handler, which generates flatten csv statistics.

Statistics should be flatten on cluster-level.
Cluster statistics should be merged with installation info and with deployment action_log info. Deployment action_log is required for fetching network type.

[Aleksey Kasatkin (alekseyk-ru)]

I'm not clear, where should the handler be added? Into the collector?

[Alexander Kislitsky (akislitsky)]

It should be placed in the fuel-stats/analytics. Collector is used only for collecting data and shouldn't have no access to the Elasticsearch in common case.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/148262

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/148262
Committed: https://git.openstack.org/cgit/stackforge/fuel-stats/commit/?id=2f4eb792332dc89cd1658c582740601238f10983
Submitter: Jenkins
Branch: master

commit 2f4eb792332dc89cd1658c582740601238f10983
Author: Alexander Kislitsky <email address hidden>
Date: Fri Jan 16 18:55:32 2015 +0300

    Http hander for fetching clusters stats as CSV

    Flask application added for export clusters statstics in CSV format.
    Export process streams data by the generators.

    Closes-Bug: #1410262
    Blueprint: export-stats-to-csv
    Change-Id: I265b617e78de142f8f10f22e85f734d0df7979c2