Added 3 test cases for defects.

Added Test Cases for
http://adsk-oss.myjetbrains.com/youtrack/issue/MAGN-3212
http://adsk-oss.myjetbrains.com/youtrack/issue/MAGN-3850
http://adsk-oss.myjetbrains.com/youtrack/issue/MAGN-3599
Merge pull request #1741 from riteshchandawar/MasterNew

Added 3 test cases for defects.