Use Foreman Orchestration class to run the model hooks

[edestecd]

This is a more structured way to do things and it ties into Foreman hooks for the progress bar upon host creation etc...

Here are orchestrations in core Foreman: https://github.com/theforeman/foreman/tree/006929d1057d5b59458d4fbf99cd20853c198ffd/app/models/concerns/orchestration

Here is a plugin that adds an orchestration: https://github.com/theforeman/puppetdb_foreman/blob/master/app/models/concerns/orchestration/puppetdb.rb#L13

[nipendar]

would need @edestecd's help on this to figure out how puppetdb initializes the Orchestration class since it is not in engine.rb and my first stab at it didn't work.

estimate it 4 hours (may change)

[nipendar]

@edestecd do we really want this since model extensions are working just fine.

[edestecd]

Yes, this will improve user experience by adding it to the progress bar on new hosts

And also provide hooks for failure etc. This is the preferred path for adding items to the orchestration of a host.