Fix OraCompression Manager syntax

[alexiswl]

Currently we don't have a 'basename' equivalent in JSON Path, so we've worked around this by setting the engineParameter's outputUri attribute to /path/to/instrumentRunId, and then setting the output directory inside the CWL workflow to portalRunId, so that outputs are places in /path/to/instrumentRunId/portalRunId where as we should be really setting the engineParameters output directory to /path/to/instrumentRunId/portalRunId and then taking the dirname as the actual value sent to ICAv2 as the output mapping path and the basename (the portal run Id) as the output directory value.