Publishing updated Tasks in Kafka

[slemrmartin]

Issue RedHatInsights/topological_inventory-ansible_tower#83

Tasks were updated through Topological API, which published Kafka event.
Catalog update depends on this event so it has to be published from persister too

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• depends on Saving updated tasks to IC topological_inventory-core#193

[slemrmartin]

@agrare I haven't tested it yet, but do you agree with this concept?

@lindgrenj6 on catalog side, do you need whole Insights::API::Common::Request.current_forwardable or x-rh-insights-request-id is enough?
Because this value has to be saved in database, I want it as small as possible

cc @syncrou

[syncrou]

@slemrmartin I talked with @eclarizio in regards to Insights::API::Common::Request.current_forwardable and as of now Catalog is only looking up the task_id. So this should be fine as it was merged.