Fixes #5692 - correct counts in cached_counters

fixes #7336 - editing compute resource should not clear existing attributes from the form

Fixes #7041: fixed incorrect belongs_to mappings

:conditions reference columns from the local (to the relation) table,
while the condition is applied to the remote side of the association.
The condition can be removed, as it's redundant anyway.

Fixes #4596 - Change parent of host group via AJAX

Reparenting host groups requires submitting the form to see the changes
nowadays, this fix makes the host group model inherit all properties
from the parent and show them in real time.

fixes #4375: provisioning no longer loops when using oVirt + compute profile

Fixes #3840 - Removes unused Signo related code

Fixes #7344 - ignore saving errors during fact parsing

Fixes #6763 - Correctly choose autocomplete search scope for taxonomies depenant on controller

Fixes #6444 - add support for virtual NICs

Extend additional interface details refs #2240

NIC facts parsing change and we create interfaces in Foreman according
to facts we recieve.

Subclasses does not define their own attributes and serialize them to
attrs hash. All BMC attributes are extracted to separate columns so it's...

fixes #4111 - Add image user data flag to API