FLUME-1729: Add sign profile to sign/calculate hash of jars
FLUME-1729: Add sign profile to sign/calculate hash of jars

(Brock Noland via Brock Noland)

tinawenqiao/flume,tmgstevens/flume,iaiengxia/flume,tinawenqiao/flume,tinawenqiao/flume,tmgstevens/flume,iaiengxia/flume,tmgstevens/flume,szaboferee/flume,szaboferee/flume,szaboferee/flume,tinawenqiao/flume,iaiengxia/flume,szaboferee/flume,iaiengxia/flume,tmgstevens/flume