HPCC-8803 Directories hpcc-data2 and hpcc-data3 don't get used

Fix the local file resolution cases.

When resolving files without a dali specified, files with :: in them will now
be assumed to refer to local 1-way files in the default directory, while ones
 without will be assumed to be physical filenames.

Signed-off-by: Richard Chapman <rchapman@hpccsystems.com>