feature: set up replication when instance joins

Picodata already assigns replicaset_id to an instance when it joins, but it wasn't used in Tarantool box.cfg yet. Now it is.

It's also important to set up listen port in start_join immediately. Without it Tarantool will stuck waiting for connection to self.

Part of #52 (closed)

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• e030bf83 - feature: set up replication when instance joins

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• 8f9e3dcd - test: make logs prettier
• 9ec26bfe - test: replication setup

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changed the description

deleted the test-storage-peers branch. This merge request now targets the master branch

added 6 commits

• 9ec26bfe...ede9cb9b - 2 commits from branch master
• 2dac77c5 - feature: set up replication when instance joins
• e5196d3b - test: make logs prettier
• 248aee81 - test: replication setup
• 4d72cc98 - test: rename a method for better readability

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