make function path consistency when initContainer downloader enabled #745

Job	Run time
integration (integration test, .ci/tests/integration/e2e.yaml)	5m 19s
integration (integration test with tls, .ci/tests/integration/e2e_with_tls.yaml)	5m 7s
integration (integration test with oauth2, .ci/tests/integration-oauth2/e2e.yaml)	5m 20s
integration (integration test with downloader, .ci/tests/integration-oauth2/e2e_with_downloader.y...	5m 21s
	21m 7s

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