Use rocks for 0.17 images #679

Job	Run time
Publish Charm / Generate the Charm Matrix	2s
Run Tests / Unit tests (katib-controller)	23s
Run Tests / Integration tests (microk8s) (katib-controller)	40m 46s
Run Tests / Unit tests (katib-db-manager)	16s
Run Tests / Integration tests (microk8s) (katib-db-manager)	38m 6s
Run Tests / Lint	13s
Run Tests / Test the bundle	1h 39m 45s
Run Tests / Check libraries (katib-controller) / Lint	8s
Run Tests / Check libraries (katib-controller) / Check libraries	28s
Run Tests / Check libraries (katib-db-manager) / Check libraries	30s
Run Tests / Check libraries (katib-db-manager) / Lint	11s
Run Tests / Check libraries (katib-ui) / Check libraries	30s
Run Tests / Check libraries (katib-ui) / Lint	10s
Publish Charm / Publish Charm (./charms/katib-ui)	20m 57s
Publish Charm / Publish Charm (./charms/katib-controller)	31m 36s
Publish Charm / Publish Charm (./charms/katib-db-manager)	28m 22s
	4h 22m 23s

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