remove JSON parsing from format, applications should handle this, as suggested by @ahocevar

tests/Format/WFSDescribeFeatureType.html

@@ -425,7 +425,7 @@
         var format = new OpenLayers.Format.WFSDescribeFeatureType();
         var res = format.read(text);
         var property = res.featureTypes[0].properties[0];
-        t.eq(property.annotation.appinfo.title["en"], "Population", "appinfo read correctly");
+        t.eq(property.annotation.appinfo, '{"title":{"en":"Population"}}', "appinfo read correctly");
         t.eq(property.annotation.documentation["en"], "Number of persons living in the state", "documentation read correctly");
     }