Fixes #3045 - Skip empty log arrays
fixes #1871, #1879 - add VPC support to EC2 compute resource

Based on patch from Romain Vrignaud <romain@yakaz.com>
fixes #2288 - Add oVirt/RHEV Quota Support
fixes #3046 - add NIC CRUD, power and boot operations API
fixes #1853 - Users now have a new filter to subscribe to new hostgroups
fixes #1719 - Add support for GCE(Google Compute Engine)
fixes #2996 - VM show screen syntax error on ruby 1.8
fixes #2944 - nic type selection for libvirt

defaults to 'virtio'

I needed this in my own setup because virtio was being buggy and would
crash my apt mirror VM. switching to e1000 fixed.

I don't particularly care for the device models being hardcoded. I would
of course prefer that it be queried from the libvirt itself, but I don't
see a way to do that.
fixes #2260 Allow ERB in ENC global / class parameters

Refactor Foreman::Renderer and HostTemplateHelpers into SafeRender
Adds code to parse the global & class parameters, and adds a setting (default true)
to disable this if needed. Also has some tests.

Thanks to Dmitri Dolguikh for the contributions that were squashed in!