Validate the input for extension job submission.
Usage: $FALCON_HOME/bin/falcon extension -validate -extensionName <<extension-name>> -file <<path-to-file>>
Optional Args : -doAs <<user-name>>
Parameters and examples described here.
Example: $FALCON_HOME/bin/falcon extension -validate -extensionName hdfs-mirroring -file /data/hdfs-mirroring-para.txt