Make test-containerized target more reliable
Make test-containerized target more reliable

Wait until the API server is responding, before starting to run tests.

dunjut/libcalico-go,insequent/libcalico-go,insequent/libcalico-go,dunjut/libcalico-go,projectcalico/libcalico-go,projectcalico/libcalico-go