ensure we print the whole trace to the debug log in cases of failures

fixes 1692 - bookmark edit dialog, did not allow to save / update bookmark name

improve SQL queries for host API requests

allow to consume provisioning templates via JSON, show method was missing

ensure that API calls get correct 404 error

fixes #1648 - User filter on hostgroup could extend to new sub hostgroup.

fixes #1619 - X-Forwarded-For multiple IPs

fixes #1650 - Session expiration prevent HTTP authentication delegation

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":[]}