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

<h3>Summary</h3>
Test Cases **MAGN-3488** from RegressionTests.cs in RevitSystemTests porject was failing on Revit2015 branch because parameter selected for Get Family Parameter node was different (Index) in Revit 2014 and Revit 2015.

I have removed **Get Family Parameter** node and added CBN with parameter name as string. Now test running on both Revit version and produces same results.

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

<h3>Reviewer</h3>
- [ ] @sharadkjaiswal 

<h3>Need merge to</h3>
- [ ] Revit2015 Branch