BUG: Fix issues with the BinaryStatisticsOpeningImageFilter test

The test missed to set one of the two required inputs (the feature image).
Besided it was not comparing to any baseline. Now a baseline image has
been added (got from the execution of the test), and a comparison to the
baseline is performed. Successful execution under Windows 7, Visual Studio
10.

An existing test for the itk::BinaryStatisticsOpeningImageFilter has been
included in the /Modules/Filtering/LabelMap/test CMakeLists. Input
arguments have also been provided. Input images have been taken from the
legacy /Testing/Data/Input repo, and copied to a local /test/Input folder.
No baseline comparison is performed yet.

Change-Id: If1d191450da23ff4d3a4f8e5ab0412353a180708
Merge topic 'BinaryShapeOpeningImageFilterCodeCoverage'

7cdd4596 BUG: Fix issues with the BinaryStatisticsOpeningImageFilter test