ENH: add Python tests

Testing/CMakeLists.txt

 add_subdirectory(Core)
+add_subdirectory(Python)
 add_subdirectory(QtWidget)
\ No newline at end of file

Testing/Python/CMakeLists.txt

+# configure the test driver
+FIND_PROGRAM(OTB_TEST_DRIVER otbTestDriver PATHS ${OTB_DIR}/bin ${OTB_DIR}/../../bin DOC "Path to the otbTestDriver executable from OTB")
+
+
+SET(TEST_DRIVER "${OTB_TEST_DRIVER}"
+    --add-before-env PYTHONPATH        "${CMAKE_BINARY_DIR}/Code/Wrappers/SWIG" 
+    --add-before-env ITK_AUTOLOAD_PATH "${CMAKE_BINARY_DIR}/Example/Smoothing"
+)
+SET(TEMP ${OTBWrapper_BINARY_DIR}/Temporary)
+
+ADD_TEST( NAME PythonTest1
+          COMMAND ${TEST_DRIVER} Execute
+                  ${PYTHON_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/PythonSmoothingTest.py 
+                  ${OTB_DATA_ROOT}/Input/ToulouseExtract_WithGeom.tif
+                  ${TEMP}/ToulouseExtract_WithGeom_ )
\ No newline at end of file

Testing/Python/PythonSmoothingTest.py

+#
+#  Example on the use of the Smoothing 
+#
+from sys import argv
+import otbApplication
+
+print otbApplication.ApplicationRegistry.GetAvailableApplications()
+
+app = otbApplication.ApplicationRegistry.CreateApplication("Smoothing")
+app.SetParameterString("in", argv[1])
+
+for type in ['mean', 'gaussian', 'anidif']:
+  app.SetParameterString("type", type)
+  app.SetParameterString("out", argv[2] + type + ".tif")
+  app.Execute()
+  
+print dir(app)