Chiara/cherrypicking master #1610

Job	Run time
check	3m 12s
rustfmt	5s
audit	16s
clippy	3m 51s
test	4m 18s
cross-aarch64	42s
integration-test-five-nodes	12m 54s
cross-armv7	43s
integration-test-db-migration	12m 7s
integration-test-eth-payments	13m 32s
integration-test-debts	16m 51s
integration-test-althea-payment	22m 16s
integration-test-multi-exit	13m 10s
integration-test-validate-contract	12m 21s
	1h 56m 18s

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