HADOOP-13601. Fix a log message typo in AbstractDelegationTokenSecretManager. Contributed by Mehran Hassani.

(cherry picked from commit e80386d69d5fb6a08aa3366e42d2518747af569f)

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/security/token/delegation/AbstractDelegationTokenSecretManager.java

@@ -517,7 +517,7 @@ extends AbstractDelegationTokenIdentifier>
     DataInputStream in = new DataInputStream(buf);
     TokenIdent id = createIdentifier();
     id.readFields(in);
-    LOG.info("Token cancelation requested for identifier: "+id);
+    LOG.info("Token cancellation requested for identifier: " + id);
     
     if (id.getUser() == null) {
       throw new InvalidToken("Token with no owner");