FLUME-2977 Upgrade RAT to 0.12
FLUME-2977 Upgrade RAT to 0.12

Git ignored files are not checked anymore.
Files with licence error are logged to the console which is more accessable
during development than opening the report file

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