Open DACS migrate to ODPS - multi-domain support

@Charles Hui
The relevant information is available on MyRefinitive within the ODPS V8.1.x Install and Developers Guide, the section that describes the userLogin command covers the domain argument and the domainsearch option.

The domainsearch option will perform an automatic search of each domain for the user supplied in the userLogin and allows you to omit the domain.

Example userLogin using the domainsearch option, given an ODPS server running on a host name "odpsdev" and listening on port number 8089 :

http://odpsdev:8089/command=userLogin&user=ted&position=1.1.1.1/net&application=256&closure=123&domainsearch=true

If you want to specify the domain, the domain names available on your ODPS can be discovered by using the domainList command which is also described in the same document and takes the form :

http://odpsdev:8089/command=domainList