Fixed a bug in JsonRequestProcessor wherein a fast test run could result in failure, because the two Date() calls would return the same millis.

Patch by: amitmanjhi
Review by: rjrjr, cromwellian (tbr)


git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@8597 8db76d5a-ed1c-0410-87a9-c151d255dfc7