Before SERVER-60823, a transaction with retryable error would be retired indefinitely. After SERVER-60823, a transaction is retried by default up to 5 times. Looking at previous execution  of jstests/core/sample_rate.js in multi_stmt_txn_jscore_passthrough_with_migration I found that there can be cases that a command is retried more than 5 times until it succeeds (i.e. 8). We should update the maximum retires threshold in multi_stmt_txn_jscore_passthrough_with_migration to allow for more retries.