Merge pull request #99 from chanchiwai-ray/fix-lint #59

Job	Run time
test-golang / Unit tests	1m 25s
build-microcluster / Build binary	1m 19s
test-golang / Lint	1m 43s
build / Build snap	8m 5s
test-python / Lint	15s
test-python / Unit tests	1m 22s
build / Functional test	2m 2s
	16m 11s

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