To enable using absolute path in mock dictionary, even when loadFile 'ed object uses relative paths in require.

example:
consider a directory structure
````
|___orm
|     |
|     |__user.js
|     |__permission.js
|___app.js

````
Then we can do this:
````javascript
mocks = {
  '/absolute/path/to/project/orm/permission.js' : require('./mock_permission')
}

var user = loadFile(__dirname+"/user.js", mock);
var app = loadFile(__dirname+"/app.js", mock);
````