Collector of OpenStack info added

POC for logic that implements collector of OpenStack installalation parameters
added. Now only number of instances inside of installation is gathered.
Collected information extends installation structure.

Is dependent on change in fuel-main repo [1].

[1]: https://review.openstack.org/#/c/135653/

Change-Id: I42f7021ccf8ef9fa22b9d5fdedf0445a26a7cfbe
Implements: blueprint send-anon-usage
Merge "Collector of OpenStack info added"