Merge pull request #1284 from haoming29/fix-ext-iss-for-self-test #28

Job	Run time
make-date-tag	1s
build-base-image	12m 41s
build-server-images (cache)	6m 21s
build-server-images (origin)	5m 56s
build-server-images (director)	6m 9s
build-server-images (registry)	5m 54s
build-server-images (osdf-cache)	6m 7s
build-server-images (osdf-origin)	6m 12s
build-server-images (osdf-director)	6m 12s
build-server-images (osdf-registry)	6m 21s
	1h 1m 54s

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