HPCC-9100 Ignore foreign info when resolving file in package

Also fix core in dadfs when subfile information not found.

Signed-off-by: Anthony Fishbeck <Anthony.Fishbeck@lexisnexis.com>
Merge pull request #4215 from afishbeck/foreignSuperfile9100

HPCC-9100 Ignore foreign info when resolving file in package

Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>