E2E tests might be failing because of a race cond with the Tendermint RPC server starting up

[sug0]

Context

In e2e tests, before we make any client transfer, we grep the ledger's log for "Anoma ledger node started". After this, we proceed to test different ledger functionality.

Problem

When ran locally, most e2e tests seem to be failing arbitrarily. Upon closer inspection of log timestamps, we find that client requests are made, correctly, after "Anoma ledger node started" is logged, but not after "module=rpc-server msg="Starting RPC HTTP server on...", which happens after the RPC server service in Tendermint starts. All client transfers make RPC requests, therefore they fail with a TCP connection reset error.

Potential fix

Grep the Tendermint log for "Starting RPC HTTP server".

[sug0]

Related with #418

[sug0]

Fixed in #646