fix the classpath issue on YARN/Windows
fix classpath issues on evaluator level, too. better logging + minor
refactoring
more refactoring in the REEFFileNames and its clients; use a single
function to build the classpath for YARN and HDInsight on all platforms
Merge branch 'master' into sergiym_yarn_classpath_fix

Conflicts:
	reef-runtime-hdinsight/src/main/java/com/microsoft/reef/runtime/hdinsight/client/HDInsightJobSubmissionHandler.java
Merge branch 'master' of github.com:Microsoft-CISL/REEF into sergiym_yarn_classpath_fix
refactor classpath logic out of REEFFileNames class into three classes
derived from REEFClasspath; other minor refactorings
Merge pull request #891 from Microsoft-CISL/sergiym_yarn_classpath_fix

Move all classpath logic to REEFFileNames