SoftwareGuideCover: Port to VTK >= 5

Convert the old SetInput/GetOutput convention for connecting the
pipeline to SetInputConnection/GetOutputPort for VTK >= 5.

Change-Id: I8bfb77a921f6393e77e25c9edf11f9edd15bfa97
Merge "SoftwareGuideCover: Port to VTK >= 5"