Fixed two test cases and turned them on by removing Assert for inconclusive.

These two test cases was marked as Assert.Inconclusive because there were some deprecated nodes, now all nodes are getting migrated correctly so by changing node type I make them worked. These tests are now passing.
Added assert for no dummy nodes.
Merge pull request #1571 from riteshchandawar/RevitTesting

Fixed two test cases and turned them on by removing Assert for inconclusive.