Specify allowed combinations of parameters

[sybernix]

Description:
Only one of the dir.uri or file.uri is allowed.
move.after.process is needed only when action.after.process is 'move'
move.after.failure is needed only when action.after.failure is 'move'

These can be specified as combination of parameters using parameter overload feature in Siddhi annotations (https://github.com/siddhi-io/siddhi/blob/master/modules/siddhi-annotations/src/main/java/io/siddhi/annotation/ParameterOverload.java)

Suggested Labels:
Type/Improvement

Related Issues:
wso2/streaming-integrator-tooling#46