Added test cases generated from Defects.

<h4>Summary</h4>
Added few more test cases which are generated from Defects which are related to Geometry and can run on Stand Alone Dynamo.

<h4>Changes</h4>
I have added all those defects to GeometryDefectTests.cs. Also addressed few comments from previous PR. #3032 

<h4>Reviewer</h4>
- [x] @Randy-Ma PTAL

<h4>Need to Merge in</h4>
- [ ] Revit2015

- [ ] @sharadkjaiswal : This needs to merge in for RC Branch as well.
- [ ] RC 074 Master
- [ ] RC 074 Revit 2015

All newly added tests are passing on latest build...
![image](https://cloud.githubusercontent.com/assets/5109531/5067049/85287ac4-6e78-11e4-9e2d-95bbf2179d37.png)

var point?