docs: add a bit of logging

oaipmh-core/src/main/java/info/textgrid/middleware/OaipmhUtilities.java

@@ -139,6 +139,8 @@ public class OaipmhUtilities {
     DatatypeFactory datatypeFactory = DatatypeFactory.newInstance();
     XMLGregorianCalendar now = datatypeFactory.newXMLGregorianCalendar(gregorianCalendar);
 
+    log.fine("NOW in UTC  is " + now.toString());
+
     return now;
   }