Fixes JUnit sessions to not use Cookies, which can be problematic.

- The session id is passed through RPC
- Session ids are now ints.

Suggested by: jlabanca
Review by: jlabanca

git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@7155 8db76d5a-ed1c-0410-87a9-c151d255dfc7
9 files changed