Removes pausing between e2e smoke tests (#220)
Removes pausing between e2e smoke tests (#220)

* Removes pausing between e2e smoke tests

 Removes time.Sleep as by default service create waits for it to
 become ready. Also adds a command to create service in --async mode.

* Checks if service create in async mode is ready

 also describes the async mode service and finally deletes it

knative/client,knative/client