Sample cleanup

<h4>Summary</h4>
As we have removed all old Sample (.dyn) files from **...\Dynamo\doc\distrib\Samples**, there were so many Samples test failing due to their path referenced to old Samples folder.

<h4>Solution</h4>
I have copy pasted those old dyn to this folder **...\Dynamo\test\System\revit\Samples**, and changed their path in respective tests. I have also added more verification to these entire Samples which was missing in old Test cases.

I have marked few tests as **Ignored** and added TODO with defect ID. I need to discuss with Ian or Zach on those tests.

**Ignored Test Cases**
- CreatePointEndSample
- CreatePointSample
- RefGridSlidersEndSample
- DivideSelectedCurveEndSample
- FormFromCurveSelectionListSample
- FormFromCurveSelectionSample
- GraphFunctionAndConnectPointsSample
- ScalableGraphFunctionSample
- GraphFunctionSample
I- nstParam2MassesDrivingEachOtherSample
- ConnectTwoPointArrays
- CreateSineWaveFromSelectedCurve

**Removed** test cases as those scenarios were covered in other tests.
- Attractor_2
- AdaptiveComponentPlacement

Defect to be address after merging this PR (http://adsk-oss.myjetbrains.com/youtrack/issue/MAGN-4041)

Few tests need more verification which I have already added in above defect.
<h4>Reviewer</h4>
@ikeough, @Randy-Ma, @lukechurch

**Test Cases Status**
![image](https://cloud.githubusercontent.com/assets/5109531/3731060/088ea7f0-16e3-11e4-812f-8e8ad5e093cc.png)

Change to use ShouldBeApproximately for all the similar places.