HADOOP-360.  Use 'kill -0' instead of 'ps -p' to check if process is alive, for better compatibility with cygwin.  Contributed by Philippe Gassmann.
HADOOP-360.  Use 'kill -0' instead of 'ps -p' to check if process is
alive, for better compatibility with cygwin.  Contributed by Philippe
Gassmann.


git-svn-id: 4d48d1092ee340c9ada5711cdbe4355b138bc22b@421248 13f79535-47bb-0310-9956-ffa450edef68

awylie/hadoop,awylie/hadoop,awylie/hadoop,awylie/hadoop,awylie/hadoop,awylie/hadoop,awylie/hadoop,awylie/hadoop,awylie/hadoop,awylie/hadoop