nfs: include read/write information to transfers

Acked-by: Gerd Behrmann
Target: master, 2.13, 2.12
Require-book: no
Require-notes: yes
(cherry picked from commit 20cce56)
Signed-off-by: Tigran Mkrtchyan <tigran.mkrtchyan@desy.de>

modules/dcache-nfs/src/main/java/org/dcache/chimera/nfsv41/door/NFSv41Door.java

@@ -877,8 +877,9 @@ private static class NfsTransfer extends RedirectedTransfer<PoolDS> {
 
         @Override
         public String toString() {
-            return String.format("    %s : %s@%s, OS=%s,cl=[%s]",
+            return String.format("    %s : %s %s@%s, OS=%s,cl=[%s]",
                     getPnfsId(),
+                    isWrite() ? "WRITE" : "READ",
                     getMoverId(),
                     getPool(),
                     ((NFS4ProtocolInfo)getProtocolInfoForPool()).stateId(),