Fix system_accord_dbeug.txn order

Author: belliottsmith

src/java/org/apache/cassandra/db/virtual/AccordDebugKeyspace.java

@@ -1601,7 +1601,7 @@ private TxnTable()
                         "Accord per-CommandStore Transaction State",
                         "CREATE TABLE %s (\n" +
                         "  command_store_id int,\n" +
-                        "  txn_id text,\n" +
+                        "  txn_id 'TxnIdUtf8Type',\n" +
                         "  save_status text,\n" +
                         "  route text,\n" +
                         "  durability text,\n" +