GEOT4362 - wfs: added supported output format to GetFeature response par...

Hi, 
this patch fixes issue GEOT-4362.

WFSDataStore is unable to execute a GetFeature on some ArcGIS servers because it doesn't support output format "text/xml; subType=gml/3.1.1/profiles/gmlsf/1.0.0/0".

I've just added this output format to Gml31GetFeatureResponseParserFactory and everything works now. Hope it's ok.