Fixes #5926 - hide sensitive parameter values

User can check to hide value when creating or editing global parameter.
The value is masked by *** and is also not displayed when overriding.
refs #3809 - Fix "`ruby_20` is not a valid platform"

:ruby_20 is unknown platform for older bundler versions
fixes #4111 - Add image user data flag to API
fixes #7054 - list all routes for each resource in /v2/api
Fixes #7286: Can not create a compute resource without selecting a provider
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
possible to search NICs by those attributes. Attrs can still be used for
custom attributes (e.g. coming from facts).

NIC form was ajaxified which means that we redraw the form for
particular interface class. We can easily define custom forms for
various interfaces types.

Added support for virtual and physical interfaces. Initial support for bridges
(to keep tests green). New attributes can be set via UI as well.

IPMI facts parsing and BMC NIC creation based on custom facts that are
present in discovery image.

NIC orchestration is now optional and can be set for every interface.
All created interfaces based on facts (BMC or Managed) are not
managed.

Store and update primary interface identifier in host.

Allow subnet selection without domain for NIC so we can use DHCP only.

Suggest IP addresses even without proxy by Foreman itself. Foreman finds
first free IP on a particular Subnet based on records in database.
Fixes #6763 - Correctly choose autocomplete search scope for taxonomies depenant on controller
Fixes #7344 - ignore saving errors during fact parsing
templates - sync from community-templates
Fixes #3840 - Removes unused Signo related code
fixes #7253 - change nil admin field on users to false, matches usergroups

When the admin field was nil, admin_changed? in user model validations can
evaluate to true if the field changed from nil to false.
fixes #3105 - use untranslated string for PuppetCA state filter
fixes #4375: provisioning no longer loops when using oVirt + compute profile
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 #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.
refs #6161 - Add test to make sure override is marked on create
fixes #7336 - editing compute resource should not clear existing attributes from the form