Make isolate.ynys.getDRC also look for #.Conga

The current logic looks for `#.DRC` as an object (either class or namespace). If isolate finds `#.DRC`, it uses it. If not found it copies Conga from the conga workspace and initializes `#.DRC←#.Conga.Init 'isolate'`. The problem is that if there are other Conga-using component, the Conga namespace might already exist. `getDRC` should check if `#.Conga` exists prior to attempting to copy it into the workspace.