Problem explanation

The new e2e tests (#902, #930) that verify whether CometBFT respects the ABCI grammar disclosed two scenarios in which this is not the case. Specifically, the scenarios were observed while running ci.toml testnet and they are the following:

1. One of the validator nodes is calling init_chain even though it runs in a recovery mode and not in a clean-start mode.
2. One of the full nodes is not calling init_chain in the beginning.

The same can be reproduced by running e2e tests with ci.toml testnet. Please remember to enable ABCI tests by setting
abci_tests_enabled = true in ci.toml file.