cmake: Increase minimal required pylint version to 1.7.1

Increase the minimal required version as older versions have a problem
with newer numpy versions.
Additionally, the new pylint version has a problem with symlinks
(pylint-dev/pylint#1470).
Therefore, run the pylint test directly on the source code and not on
the build folder.

CMakeLists.txt

@@ -297,7 +297,7 @@ set_package_properties(NumPy
 # setup pylint (optional)
 message(STATUS "")
 message(STATUS ">>> Setting up pylint.")
-find_package(PYLINT 1.5.5)
+find_package(PYLINT 1.7.1)
 set_package_properties(PYLINT
 	PROPERTIES
 	DESCRIPTION "code analysis for Python"

pyInterface/CMakeLists.txt

@@ -162,12 +162,12 @@ if(PYLINT_FOUND)
 	# check 'pyRootPwa' module
 	add_test(
 		NAME pyLintPyRootPwa
-		COMMAND ${PYLINT_EXECUTABLE} --reports=n --rcfile=${CMAKE_CURRENT_SOURCE_DIR}/pylintrc pyRootPwa
+		COMMAND ${PYLINT_EXECUTABLE} --reports=n --rcfile=${CMAKE_CURRENT_SOURCE_DIR}/pylintrc module
 	)
 	set_property(
 		TEST pyLintPyRootPwa
 		APPEND
-		PROPERTY ENVIRONMENT "PYTHONPATH=${PYTHON_LIBRARY_OUTPUT_PATH}:$ENV{PYTHONPATH}"
+		PROPERTY ENVIRONMENT "PYTHONPATH=${CMAKE_CURRENT_SOURCE_DIR}:${PYTHON_LIBRARY_OUTPUT_PATH}:$ENV{PYTHONPATH}"
 	)
 
 	# check scripts