Updating Flume version in RELEASE-NOTES for release 1.9.0
Updating Flume version in RELEASE-NOTES for release 1.9.0

tmgstevens/flume,tmgstevens/flume,szaboferee/flume,tmgstevens/flume,tmgstevens/flume,szaboferee/flume,szaboferee/flume,szaboferee/flume