Replace the deprecated flux command with the new one

See #310.

Author: dr0i

metafacture-runner/src/main/dist/examples/marc21-to-edm/MARC21-EDM.flux

@@ -15,5 +15,5 @@ handle-marcxml|
 morph(FLUX_DIR + "MARC21-EDM.xml", *)|
 add-oreaggregation|
 rdf-macros|
-stream-to-xml(roottag="rdf:RDF", recordtag="", namespacefile= FLUX_DIR+"edm-namespaces.properties")|
-write(out);
+encode-xml(roottag="rdf:RDF", recordtag="", namespacefile= FLUX_DIR+"edm-namespaces.properties")|
+write(out);