Problem: test tx generation can't be run in parallel #6883

Job	Run time
integration_tests (unmarked)	8m 52s
integration_tests (ibc)	9m 47s
integration_tests (ibc_rly_evm)	7m 32s
integration_tests (ibc_rly_gas)	11m 37s
integration_tests (ibc_timeout)	5m 1s
integration_tests (ibc_update_client)	6m 39s
integration_tests (ica)	13m 28s
integration_tests (gov)	4m 5s
integration_tests (upgrade)	5m 33s
integration_tests (slow)	6m 19s
integration_tests (gas)	5m 7s
upload-cache	0s
	1h 24m 0s

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