fixes #14664 - support IPv6 in Nic, Hosts and Hostgroups models

Fixes #15225 - correct permission mapping for api puppet import

Fixes #15246 - correctly override array params

When editing inline array params would be parsed as js objects.
This was a result of using the jquery data api.

Fixes #8797 - Separate style from the HTML in emails

By using roadie-rails gem (1.1) style can be separated from email
html foramt, and absolute paths can be used.
style was separated to 'email.css'

Fixes #15238 - ignore empty NIC identifiers

fixes #15247 - reference PuppetError class correctly

Fixes #15066 - operating systems and ovirt < 3.6

The operating systems endpoint was added in ovirt 3.6
https://bugzilla.redhat.com/show_bug.cgi?id=1050243. Older versions
were failing getting 404 when provisioning.

This patch adds a check for this case. We also cache the operating...

Fixes #15166 - correct layout of dashboard when zoomed

Fixes #6539 - missing templates error is now descriptive

fixes #15223 - query parameters are now correct.

before this patch, there were two query
parameters (/hosts/template_used?id=47?provisioning=build).
since the view always prepand the hosts ID parameter, it is safe
to assume the URL always contain a leading parameter (e.g....