[Rule] Detect the use of .then(function(){}, function(){})

When using promise, we often use the `then` method with two parameters : one for success and one for error. Some guidelines explain that we should avoid the use of this signature, and use the `catch` method.

``` javascript
//bad
$http(...).then(
function(){},
function(){},
)

//good
$http(...)
.then(function(){})
.catch(function(){})
```