WFS from metadata

Yeah this is coming from Portal config where the server URLs are always set for WMS services, but we are going to use it for WFS. So to do that we do a simple text replace.

Basically I am moving a bit of a hack out of the common code. This used to be lower-down in the OpenLayers class, but I have pushed it back up closer to the only place where it is needed now. Now the OpenLayers class doesn't try to use the Portal db when making a WFS URL. Later when the BODAAC stuff is refactored this line will go for good.