JBIDE-17233 - Add usage tracking for the WS Tester

I would use "ws" as a category name. Maybe in the future, we will add more tracking of WS component. Then we won't have to create one more category for WS. And you could use "wstester-invoke" or just "wstester" as an action name then. And it's better to add a value description too, since every count event has a value = the number of times this event has been count for the day.
So I suggest using the following constructor:

requestSubmittedEventType = new UsageEventType(this, "wstester", "Request method (JAX-WS|GET|POST|PUT|DELETE|OPTIONS)", UsageEventType.HOW_MANY_TIMES_VALUE_DESCRIPTION);

This constructor will create an event type with the following properties:
Category="ws"
Action="wstester" (or "wstester-invoke" if you like it better)
Label Description="Request method (JAX-WS|GET|POST|PUT|DELETE|OPTIONS)"
Value Description="How many times during the day"