Add simple testing to CGNS plugin

add 5blocks_cgns test from VisIt CGNS reader
correct undefined symbols in vtkCGNSReaderInternal.cxx

Change-Id: I64c7e2ac023e31c2b64cf8612529b07471f812c9
vtkPVFileInformation: more NULL checking on Apple

Change-Id: I66d049699d19fcaf34ea3c851e9f165034717980
testing: add mangling to pvbatch tests

Without this, a call to paraview_add_test_python and
paraview_add_test_pvbatch with the same files will cause conflicts.

Change-Id: I95e4427b490ec22001d6211bc7aba720eb4276c3
vtkPVFileInformation: use NewHandle for AliasHandle alloc

Follows the examples for examples doing similar things from Apple's site
and malloc seems to crash in some cases.

Change-Id: Ie8b1659c543b6bbcca02edcff6d8c65eec75836e
revert branch

Change-Id: I541b99035f8ab6443cec6011110618f7755836f7
Merge topic 'add_cgns_plugin_test' into next

8ec1f86d Add simple testing to CGNS plugin
Merge topic 'mangle-pvbatch-test-names' into next

4d65c068 testing: add mangling to pvbatch tests
Merge topic 'cfapi-null-logic' into next

9c869998 revert branch
08491158 vtkPVFileInformation: use NewHandle for AliasHandle alloc
27bb71f0 vtkPVFileInformation: more NULL checking on Apple