Collecting stashcp information

stashcp command has been instrumented to send the most important information in a json format to a flume collector running at University of Chicago. The flume instance is configured to use http source listening on hadoop-dev.mwt2.org:80. It "sinks" the received data into log files(/var/log/StashCollector), HDFS (/user/ivukotic/StashCollector/), and ElasticSearch(index name: stashcache). Flume instance can be monitored at: http://hadoop-dev.mwt2.org:34548/metrics