Changed Get Family Parameter node to simple CBN to make same dyn work for R-2014 and 2015

- I have also changed .rvt file which was coming from older version of Revit and was taking time to upgrade to Revit 2014. Now saved file in Revit-2014
Merge pull request #3343 from riteshchandawar/FixTestCaseMagn-3488

Changed Get Family Parameter node to simple CBN to make same dyn work for R-2014 and 2015
Merge pull request #3344 from DynamoDS/master

Merge pull request #3343 from riteshchandawar/FixTestCaseMagn-3488