patman: Correct pylint errors

Fix pylint errors that can be fixed and mask those that seem to be
incorrect.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/tools/patman/command.py b/tools/patman/command.py
index 2435878..92c453b 100644
--- a/tools/patman/command.py
+++ b/tools/patman/command.py
@@ -17,13 +17,6 @@
         return_code: Return code from command
         exception: Exception received, or None if all ok
     """
-    def __init__(self):
-        self.stdout = None
-        self.stderr = None
-        self.combined = None
-        self.return_code = None
-        self.exception = None
-
     def __init__(self, stdout='', stderr='', combined='', return_code=0,
                  exception=None):
         self.stdout = stdout
@@ -72,6 +65,7 @@
     """
     if test_result:
         if hasattr(test_result, '__call__'):
+            # pylint: disable=E1102
             result = test_result(pipe_list=pipe_list)
             if result:
                 return result