fix request param

Author: chrisdukakis

lib/api/apiCommands.js

@@ -232,7 +232,7 @@ var checkConsistency = function(hashes) {
 
     var command = {
         'command' : 'checkConsistency',
-        'hashes'    : hashes
+        'tails'    : hashes
     };
 
     return command;