fix test

Author: rettinghaus

src/importexport/musicxml/tests/data/testSibOttavas_ref.mscx

@@ -147,6 +147,7 @@
     <metaTag name="arranger"></metaTag>
     <metaTag name="composer"></metaTag>
     <metaTag name="copyright"></metaTag>
+    <metaTag name="encoder">James Mizen</metaTag>
     <metaTag name="lyricist"></metaTag>
     <metaTag name="movementNumber"></metaTag>
     <metaTag name="movementTitle"></metaTag>