HPCC-9559 ecl-packagemap-query-files command to show query file mappings

The "ecl packagemap query-files" command will list the files used by
a given query and show if/how they are mapped to SuperFiles defined
in the active packagemap for the given cluster.  --pmid option allows
an inactive packagemap to be used instead.

Signed-off-by: Anthony Fishbeck <Anthony.Fishbeck@lexisnexis.com>