fixes #3902 - [Openstack] allow selection of internal networks

This patch allows the user to select the internal network when deploying
a new instance in openstack.

In Grizlly, this was done automaticilly, with a nasty side effect, that
all internal networks would get assigned (didnt see that as i had only...

fixes #5896 - Set Compute Resource's 'Console passwords' option in API

fixes #4111 - Add image user data flag to API

Fixes #6756 - exposes vmware resource pools and folders through the API

Fixes #6476 - oVirt VM association with multiple interfaces

Fixes #6608 - expose disk usage info through available_storage_domains API

Fixes #6816 - pass oVirt quota as nil instead of "" to prevent server error

fixes #5760 - selectable VMware virtual HW version

fixes #5197 - Preallocated disk support for oVirt

Fixes #6099 - Bubble Fog::Errors up to Host