conf: storage: store namespace prefix

Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>

src/storage/storage_backend_fs.c

@@ -705,6 +705,7 @@ static virXMLNamespace virStoragePoolFSXMLNamespace = {
     .parse = virStoragePoolDefFSNamespaceParse,
     .free = virStoragePoolDefFSNamespaceFree,
     .format = virStoragePoolDefFSNamespaceFormatXML,
+    .prefix = "fs",
     .href = virStoragePoolDefFSNamespaceHref,
 };
 #endif /* WITH_STORAGE_FS */

src/storage/storage_backend_rbd.c

@@ -1546,6 +1546,7 @@ static virXMLNamespace virStoragePoolRBDXMLNamespace = {
     .parse = virStoragePoolDefRBDNamespaceParse,
     .free = virStoragePoolDefRBDNamespaceFree,
     .format = virStoragePoolDefRBDNamespaceFormatXML,
+    .prefix = "rbd",
     .href = virStoragePoolDefRBDNamespaceHref,
 };