Implement support for Nova V2.1 API

Nova V3 API was deprecated in favor for Nova V2.1 API. since
we had it offered only optionally and disabled by default, and
since it is currently completely broken, lets just remove it
alltogether and enable V2.1 API instead, which is going to be
stable going forward.
Fix live migration when HA is enabled in nova

This was failing because qemu was listening to the admin IP address of
the compute node instead of 0.0.0.0, and this IP address is not
available on the destination compute host.
Merge pull request #401 from vuntz/vncserver-ha

Fix live migration when HA is enabled in nova
Merge pull request #397 from dirkmueller/master

Implement support for Nova V2.1 API
Change array_string_field and add :only_comma option as true

This is fix for bnc#903674
Crowbar and/or nova cannot cope with vCenter cluster names containing spaces
https://bugzilla.suse.com/show_bug.cgi?id=903674
Add quotation marks to vmware cluster_names option
Merge pull request #404 from mjura/bnc903674

Change array_string_field and add :only_comma option as true
Skip nodes which don't have cpu information (bnc#900036)

They're likely not kvm capable.
Merge pull request #405 from dirkmueller/missing_cpu

Skip nodes which don't have cpu information (bnc#900036)
Fixed raw/custom proposal links
Cleaned crowbar config and added travis image to readme

The goal is to remove the package requirements from the crowbar
configuration as the dev tool and all the dependencies for building isos
on the dell way is not maintained anymore and move the packaging to obs
instead.
Added ruby 2.1.0 to travis config
Adjust templates for Juno
Merge pull request #409 from rhafer/juno-config

Adjust templates for Juno
Merge pull request #406 from SUSE-Cloud/master-rails-4

Rails 4 upgrade
Limit number of workers for OpenStack API services (bnc#893771)
Merge pull request #408 from mjura/bnc893771

Limit number of workers for OpenStack API services (bnc#893771)
Make nova compute deployable on SLE12