general bug fixes and improvements
Merge branch 'release-2.1' of github.com:azkaban/azkaban-plugins into release-2.1
fixes to hdfs browser so that we don't have leaky connections
fixes to jobtypes so that we can supress user classpath for certain types
fixes to pig type on non-secure hadoop
bug fixes to clean up jsonSequenceFileReader problem
fix to close opened connection
remove pig ambrose stuff