Build only images needed for tests (#15642)
Build only images needed for tests (#15642)


istio/istio,smawson/istio,geeknoid/istio,smawson/istio,smawson/istio,istio/istio,smawson/istio,istio/istio,istio/istio,istio/istio,smawson/istio,smawson/istio,geeknoid/istio,geeknoid/istio,geeknoid/istio,geeknoid/istio,geeknoid/istio