connect to openrpt from node-datasource

Requires https://github.com/xtuple/xtuple-server/issues/212

This change to the route will expose an API that looks like this:
`https://localhost/demo_dev/generate-report?nameSpace=ORPT&type=AddressesMasterList`
and this:
`https://localhost/demo_dev/generate-report?nameSpace=ORPT&type=AROpenItems&params=startDate:date=%272007-01-01%27`

resolves #1992.