BUG: Update vtkObject Tcl variable name generation for VTK 7

This commit ensures that Tcl variable names generated for vtkObjects are valid
with VTK 7.

In VTK 7, the repr() of vtkObjects now includes the module name in addition to
the class name and memory address. By replacing the period separating the module
name and class name and removing the parentheses, we ensure that the returned
name is valid for a Tcl variable.

This fixes the following tests:

EMSegCL_IntermediateResults
EMSegCL_RunDefaultNodes
EMSegCL_RunSetEverything
EMSegCL_Task_BRAINS_MRIHumanBrain_scalartype_float_very_small
EMSegCL_Task_BRAINS_MRIHumanBrain_scalartype_uint_very_small
EMSegCL_Task_HumanEye_BRAINS_small
EMSegCL_Task_MRIHumanBrainExp_BRAINS_small
EMSegCL_Task_MRIHumanBrainFullParcellation_BRAINS_small
EMSegCL_Task_MRIHumanBrainParcellation_BRAINS_small
EMSegCL_Task_MRIHumanBrain_2CH
EMSegCL_Task_MRIHumanBrain_BRAINS_small
EMSegCL_Task_NonHumanPrimate_BRAINS_small

git-svn-id: http://svn.slicer.org/Slicer4/trunk@25226 3bd1e089-480b-0410-8dfb-8563597acbee