add RELEASE_NOTE generation script (backport #336) #917

Job	Run time
build (amd64)	10s
install-tparse	15s
split-test-files	21s
cleanup-runs	6s
test-upgrade-name	8s
tests (00)	11s
test-integration (00)	17s
tests (01)	16s
test-integration-multi-node (00)	12s
test-integration (01)	19s
test-integration (02)	11s
tests (02)	22s
test-integration-multi-node (01)	12s
test-integration (03)	17s
test-integration-multi-node (02)	19s
tests (03)	12s
test-integration-multi-node (03)	16s
test_integration_multi_node_report	4s
test-integration-report	8s
upload-coverage-report	6s
test-localnet-blocks	2m 50s
	7m 12s

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