srm: fix Copy scheduling

Recent refactoring resulted in srmCopy operations failing with the message:

    Scheduler for class class org.dcache.srm.request.CopyRequest is not
    supported.

This patch fixes srmCopy and the error message.

Target: master
Requires-book: no
Requires-notes: no

modules/srm-server/src/main/java/org/dcache/srm/request/CopyRequest.java

@@ -359,6 +359,12 @@ public void proccessRequest() throws DataAccessException, IOException,
         getTURLs();
     }
 
+    @Override
+    public Class<? extends Job> getSchedulerType()
+    {
+        return Job.class;
+    }
+
     private void identify() throws IOException, SRMException {
         wlock();
         try {

modules/srm-server/src/main/java/org/dcache/srm/scheduler/SchedulerContainer.java

@@ -89,8 +89,8 @@ private Scheduler getScheduler(Scheduler suggestion, Class<? extends Job> type)
         }
 
         if (suggestion == null) {
-            throw new UnsupportedOperationException("Scheduler for class " +
-                    type + " is not supported");
+            throw new UnsupportedOperationException("Scheduler for " + type +
+                    " is not supported");
         }
 
         return suggestion;