fixing flakiness in voting and forked chain tests 📦

[heifner]

Change Description

Fixes:

1. nodeos_voting_lr_test. It was broken after bugfix in Node.waitForIrreversibleBlock where it was waiting for head instead of lib. After fix this increased execution time and lead to timeout fails.
2. nodeos_forked_chain_lr_test. It had flakiness due to race condition in head catchup and switching forks that lead to go_away_message being sent with status benign_other due to unknown block requested. Fix adding retry after closing connection.

https://github.com/EOSIO/eos/pull/10381

Change Type

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Testing Changes

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