The copies are not cast, so they don't trigger further "when you cast" abilities.
You will have two copies of Lightning Bolt from the original Repeated Reverberation, two copies from the Reverberation copy created by Swarm, and one copy of Bolt from the Swarm directly, for a total 5 copies plus the original Bolt.
You will have two copies of Lightning Bolt from the original Repeated Reverberation, two copies from the Reverberation copy created by Swarm, and one copy of Bolt from the Swarm directly, for a total 5 copies plus the original Bolt.