cmake: fix adding of python_wrapper unit test

unittest/CMakeLists.txt

@@ -79,14 +79,12 @@ IF(BUILD_PYTHON_INTERFACE)
 
   TARGET_LINK_LIBRARIES(python_parser ${PYWRAP})
   TARGET_LINK_LIBRARIES(python_parser ${PYTHON_LIBRARIES})
-  SET_PROPERTY(TEST python_parser PROPERTY ENVIRONMENT
-    "PYTHONPATH=${CMAKE_BINARY_DIR}/bindings/python:$ENV{PYTHONPATH}")
+  SET(ENV_VARIABLES "PYTHONPATH=${CMAKE_BINARY_DIR}/bindings/python:$ENV{PYTHONPATH}")
   IF(APPLE)
-    SET_PROPERTY(TEST python_parser PROPERTY ENVIRONMENT
-      "LD_LIBRARY_PATH=$ENV{LD_LIBRARY_PATH}")
-    SET_PROPERTY(TEST python_parser PROPERTY ENVIRONMENT
-      "DYLD_LIBRARY_PATH=$ENV{DYLD_LIBRARY_PATH}")
+    LIST(APPEND ENV_VARIABLES "LD_LIBRARY_PATH=$ENV{LD_LIBRARY_PATH}")
+    LIST(APPEND ENV_VARIABLES "DYLD_LIBRARY_PATH=$ENV{DYLD_LIBRARY_PATH}")
   ENDIF(APPLE)
+  SET_PROPERTY(TEST python_parser PROPERTY ENVIRONMENT ${ENV_VARIABLES})
   ADD_SUBDIRECTORY(python)
 ENDIF(BUILD_PYTHON_INTERFACE)