[TACHYON-163]After 5 attempts we exit to avoid infinity retires

https://tachyon.atlassian.net/browse/TACHYON-163

Probably we should exit after attempts
If the connect method leads to infinity loop, user might think TahcyonWorker is fine with seeing the JVM process still existing.
Your title and this patch don't seem to match.  I still don't see how this retries 5 times.  This looks like on any network issue, kill the JVM.