fixes #1657 - Support Puppet http reports processor

this patch allow usage of puppet http report processor.
in order to use it simply update your puppet.conf to have the following:

reports = http
reporturl = http://foreman/reports

NOTE: its not possible to use ssl URLS with the current report processor (AFAIK)

Send error messages through JSON instead of just {"errors":[]}

fixes #1572

fixes #1597 - Restrict compute resources access by user

And add some rights to give non admin users so they can perform some normal actions on the hosts they own.

unit/domain_parameter_test.rb self-broke... added a tiny fix.
Removing compute_resources/vms nesting, it is such a nightmare for functional tests....

minor visual fixes to the compute resource view.

incorrect usage of my hosts scope while processing a error in displaying host list

adds ec2 provisioning support fixes #1223

- added progress bar for instance creation
- minor fixes for certname based deployments
- added ssh provisioning support to orchestartion, which utilize finish
scripts by default
- added images support (part of the vm compute tab)...

Refactor my_hosts and my_facts scopes to include auth checks

Fix privacy leaks in stats, facts, and dashboard - fixes #1582

Add AIF pxe type - refs #1620