TEST: Add Shark KMeans tests.

Modules/Applications/AppClassification/test/CMakeLists.txt

...arning/Supervised/test/otbMachineLearningModelCanRead.cxx

Modules/Learning/Supervised/test/otbSupervisedTestDriver.cxx

...Learning/Supervised/test/otbTrainMachineLearningModel.cxx

Modules/Learning/Supervised/test/tests-shark.cmake