A little re.sub hack to enable paramiko ssh to succeed at the remote java -jar h2o*.jar cmd,
on a windows xp cygwin. Since the java executable apparently wants windows path names...(old windows?), avoid using 'java -jar /tmp/h2o*jar' by getting the /tmp/ out and do a 'cd /tmp;' followed by 'java -jar h2o*jar'. the cd works fine.