message: fix fee estimate SDK test
  Summary: we changed the default on the server side a while ago
  Reviewers: arik, alex
  Subscribers: ben
diff: @@ -294,7 +294,7 @@ describe('BitGo', function() {
  .then(function(res) {
  res.should.have.property('feePerKb');
  res.should.have.property('numBlocks');
  - res.numBlocks.should.eql(3);
  + res.numBlocks.should.eql(2);
  res.feePerKb.should.be.within(1000, 100000);
  target1confirmFee = res.feePerKb;
  });
  