Synchronizations should be visible in the Provisioning Tasks list

[oveits]

All background jobs including the synchronization jobs should be visible in a tasks list. Today, only provision methods :create and :delete are seen.

[oveits]

Implementation idea:

1. add :synchronize as provision method
   or
2. generalize the provisioning tasks to general "tasks" or "tickets"

• provisionings (a.k.a. provisioning tasks) then are a dependent model
• readings could be another dependent model
• synchronizations could be a third dependent model

In order to decide between 1) and 2), I need to evaluate, which method is DRYer.

[oveits]

Implemented in e697c3d (see this diff) like follows:

• Added new model GeneralJob based on ActiveJob (under app/jobs)
• save it on the database via provisioning = Provisioning.new(...).save (otherwise it will be lost, once the job is finished)
• instead of delivering the provisioning via provisioning.deliver (as I do it with provision/de-provision/read), I run it via job = GeneralJob.perform_later(self, "synchronizeSynchronously") in app/models/provisioningobject.rb: synchronize method.

TODO:

• In future, I will need to migrate the old style delayed_job delivery to ActiveJob delivery (see Migrate the old style delayed_job delivery to ActiveJob delivery #45).

[oveits]

Feature is implemented in e697c3d. I will close the request. Implementation improvements will be handled in other request (e.g. issue #45).