Fix for test_log_buf to work with python3

In python3, output needs to be converted from ascii to str before the
"error_msg in str" test will succeed. This change should be backwards
compatible with python2.
Signed-off-by: Brenden Blanco <bblanco@gmail.com>

tests/python/CMakeLists.txt

@@ -17,7 +17,7 @@ endif()
 add_test(NAME py_test_stat1_b WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
   COMMAND ${TEST_WRAPPER} py_stat1_b namespace ${CMAKE_CURRENT_SOURCE_DIR}/test_stat1.py test_stat1.b proto.b)
 add_test(NAME py_test_bpf_log WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
-  COMMAND ${TEST_WRAPPER} py_bpf_prog namespace ${CMAKE_CURRENT_SOURCE_DIR}/test_bpf_log.py)
+  COMMAND ${TEST_WRAPPER} py_bpf_prog sudo ${CMAKE_CURRENT_SOURCE_DIR}/test_bpf_log.py)
 add_test(NAME py_test_stat1_c WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
   COMMAND ${TEST_WRAPPER} py_stat1_c namespace ${CMAKE_CURRENT_SOURCE_DIR}/test_stat1.py test_stat1.c)
 #add_test(NAME py_test_xlate1_b WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}

tests/python/test_bpf_log.py

@@ -51,7 +51,7 @@ class TestBPFProgLoad(TestCase):
         except Exception:
             self.fp.flush()
             self.fp.seek(0)
-            self.assertEqual(error_msg in self.fp.read(), True)
+            self.assertEqual(error_msg in self.fp.read().decode(), True)
 
 
     def test_log_no_debug(self):
@@ -61,7 +61,7 @@ class TestBPFProgLoad(TestCase):
         except Exception:
             self.fp.flush()
             self.fp.seek(0)
-            self.assertEqual(error_msg in self.fp.read(), True)
+            self.assertEqual(error_msg in self.fp.read().decode(), True)
 
 
 if __name__ == "__main__":