HPCC-11754 Support copy of entire queryset from one environment to another

ecl copy-set //IP:PORT/&lt;src-queryset> &lt;dest-queryset> 

Also enhance behavior whenever copying queries from a remote environment:

Will try and reuse an existing local copy of the workunit, matching WUID,
hash, and dllCrc.

Otherwise try and reuse the WUID from the remote environment.

Also try and identify existing copies of the same query dll.

Signed-off-by: Anthony Fishbeck <anthony.fishbeck@lexisnexis.com>
Yes unfortunately the inconsistent case is correct.. and because these structures are part of the externally facing web service interfaces, can't easily be changed.  And in these interfaces the values are elements rather than attributes.