Pranay/multi exit #1359

Job	Run time
check	2m 30s
test	7m 4s
clippy	6m 21s
rustfmt	8s
audit	26s
cross-mips	56s
cross-mips64	49s
cross-aarch64	50s
cross-armv7	56s
cross-mips64el	43s
cross-mipsel	43s
integration-test-five-nodes	22m 30s
legacy_integration-test	29m 44s
legacy_integration-test-with-backcompat	32m 9s
integration-test-althea-payment	24m 52s
integration-test-debts	55m 23s
integration-test-eth-payments	23m 34s
	3h 29m 38s

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