[wps-client-lib] GML usage, XSD provision

[dalcacer]

When using the client in standalone-mode or within a non-public, unreachable WPS server, loading and sending a given featurecollection (GML) fails.

The client sided GML parser receives the predefined XSD-file and stores it within an temp directory. When sending the WPS:execute() with complexdatas that XSD is referred to.

In standalone-mode the reference points to a local filepath.
In sever-mode the references points to a remote, unreachable, URI.

In both cases the remote GML parser, which is set to strict mode, can't lookup the according XSD.