Fix https://issues.apache.org/bugzilla/show_bug.cgi?id=55342
Remove unnecessary reset of interrupted flag.
If the InterruptedException is thrown, the interrupted flag has been cleared.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/tc7.0.x/trunk@1519905 13f79535-47bb-0310-9956-ffa450edef68