Removed REEF_JAR as a parameter in all its instances. It is superseeded by our classpath copying mechanism
Merge branch 'master' of https://github.com/Microsoft-CISL/REEF into weimer_remove_reef_jar
Merge pull request #660 from Microsoft-CISL/weimer_remove_reef_jar

Removed REEF_JAR as a parameter in all its instances. 

looks good