Update offline scrub for 1.0-> 1.1 directory structure

patch by Omid Aladini; reviewed by Marcus Eriksson for CASSANDRA-5195)

CHANGES.txt

@@ -1,4 +1,5 @@
 1.1.11
+ * Update offline scrub for 1.0 -> 1.1 directory structure (CASSANDRA-5195)
  * add tmp flag to Descriptor hashcode (CASSANDRA-4021)
  * fix logging of "Found table data in data directories" when only system tables
    are present (CASSANDRA-5289)

src/java/org/apache/cassandra/tools/StandaloneScrubber.java

@@ -55,6 +55,8 @@ public class StandaloneScrubber
         Options options = Options.parseArgs(args);
         try
         {
+            Directories.migrateSSTables();
+
             // load keyspace descriptions.
             DatabaseDescriptor.loadSchemas();