Fix go.mod #344

Job	Run time
build / Build	6m 48s
Integration Tests (certrotation)	2m 32s
Integration Tests (cacertrotation)	2m 38s
Integration Tests (etcdrestore)	2m 42s
Integration Tests (localstorage)	2m 47s
Integration Tests (startup)	6m 46s
Integration Tests (custometcdargs)	1m 35s
Integration Tests (etcdsnapshot)	8m 24s
Integration Tests (kubeflags)	7m 46s
Integration Tests (longhorn)	3m 19s
Integration Tests (secretsencryption)	3m 10s
Integration Tests (flannelnone)	2m 1s
	50m 28s

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