Adding license headers and integrating rat to carbon-event-processing
Merge remote-tracking branch 'origin/master'

Conflicts:
	components/adaptors/event-input-adaptor/org.wso2.carbon.event.input.adaptor.file/src/main/java/org/wso2/carbon/event/input/adaptor/file/internal/listener/FileTailerListener.java
Merge branch 'master' of https://github.com/wso2-dev/carbon-event-processing