Parlour/Sqoop integration

The problem is that it has to match the source type, not just the path.

From http://docs.cascading.org/cascading/2.1/javadoc/cascading/cascade/CascadeConnector.html
"One Flow is dependent on another if the first sinks (produces) output that the second Flow sources (consumes) as input. A sink and source are considered equivalent if the fully qualified identifier, typically Tap.getFullIdentifier(Object) from either are equals()."

It felt way too brittle for us to attempt to construct a sink that we thought would match, since we have no guarantee of the next job's source type. eg they could use a custom delimited source, with an `each`, filter or something. This makes the full identifiers not match.