Added more robust testing for VTK using both serial and parallel mesh
(closes #3148)
Limit test to clang (#3148)
Merge pull request #3149 from aeslaughter/vtk-3148

Added more robust testing for VTK using both serial and parallel mesh
Merge commit 'ff0d04f4b22a59d7418f805e1d7dc2fbd19f26c0'