Using Pylint Tool to Test the python tutorial codes

* Adding CMake script to check if pylint is installed
* Adding Pylint config file (to choose the tests that are enabled)
* Adding CMake script to samples/python/tutorial_code

Testing: bad-indentation, mixed-indentation, unnecessary-semicolon, unused-variable

samples/python/tutorial_code/CMakeLists.txt

@@ -0,0 +1,23 @@
+# ----------------------------------------------------------------------------
+#  CMake file to run pylint on the tutorial python files.
+#
+# ----------------------------------------------------------------------------
+include(${CMAKE_SOURCE_DIR}/cmake/FindPylint.cmake)
+
+project(run_pylint_on_tutorials)
+
+if(PYLINT_FOUND)
+  message(STATUS "pylint version: ${PYLINT_VERSION}")
+  set(curdir "${CMAKE_CURRENT_SOURCE_DIR}")
+  file(GLOB_RECURSE PYTHON_SCRIPTS ${curdir}/*.py)
+  add_custom_target("${PROJECT_NAME}")
+
+  foreach(SCRIPT ${PYTHON_SCRIPTS})
+    get_filename_component(SCRIPT_NAME ${SCRIPT} NAME_WE)
+    add_custom_command(TARGET "${PROJECT_NAME}"
+                       COMMAND ${PYLINT_EXECUTABLE} ${SCRIPT}
+                            --rcfile=${curdir}/pylintrc
+                       COMMENT "Running pylint on : ${SCRIPT_NAME}.py"
+                      )
+  endforeach()
+endif()