Converting the test to a combo-framework test.

8217825: Verify @AfterTest is used correctly in WebSocket tests Summary: Remove @AfterTest tags; added in explicit closing of resources e.g. httpServer, webSocket, etc Reviewed-by: dfuchs, prappo

8231186: Replace html tag <code>foo</code> with javadoc tag {@code foo} in java.base Summary: Minor coding style update of javadoc tag in any file in java.base Reviewed-by: bchristi, lancea