RunStyleHtmlUnit was not setting the number of clients.

- Changed API to force all RunStyles to return the number of clients, preventing future bugs like this.
- JUnitMessageQueue now holds numClients as a final variable, preventing state mismatch.

Review by: jlabanca (desk)

git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@6945 8db76d5a-ed1c-0410-87a9-c151d255dfc7
10 files changed