buildman: 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/buildman/builder.py b/tools/buildman/builder.py
index 754642d..ecbfa3e 100644
--- a/tools/buildman/builder.py
+++ b/tools/buildman/builder.py
@@ -1763,7 +1763,7 @@
             if self.num_threads:
                 self.queue.put(job)
             else:
-                results = self._single_builder.RunJob(job)
+                self._single_builder.RunJob(job)
 
         if self.num_threads:
             term = threading.Thread(target=self.queue.join)
diff --git a/tools/buildman/cfgutil.py b/tools/buildman/cfgutil.py
index 4eba508..ab74a8e 100644
--- a/tools/buildman/cfgutil.py
+++ b/tools/buildman/cfgutil.py
@@ -123,10 +123,10 @@
                  C=val to set the value of C (val must have quotes if C is
                      a string Kconfig)
     """
-    lines = tools.ReadFile(fname, binary=False).splitlines()
+    lines = tools.read_file(fname, binary=False).splitlines()
     out_lines = adjust_cfg_lines(lines, adjust_cfg)
     out = '\n'.join(out_lines) + '\n'
-    tools.WriteFile(fname, out, binary=False)
+    tools.write_file(fname, out, binary=False)
 
 def convert_list_to_dict(adjust_cfg_list):
     """Convert a list of config changes into the dict used by adjust_cfg_file()
@@ -219,7 +219,7 @@
     Returns:
         str: None if OK, else an error string listing the problems
     """
-    lines = tools.ReadFile(fname, binary=False).splitlines()
+    lines = tools.read_file(fname, binary=False).splitlines()
     bad_cfgs = check_cfg_lines(lines, adjust_cfg)
     if bad_cfgs:
         out = [f'{cfg:20}  {line}' for cfg, line in bad_cfgs]
diff --git a/tools/buildman/func_test.py b/tools/buildman/func_test.py
index 6fcceb0..fbf6706 100644
--- a/tools/buildman/func_test.py
+++ b/tools/buildman/func_test.py
@@ -524,12 +524,6 @@
         # Each commit has a config and make
         self.assertEqual(self._make_calls, len(boards) * self._commits * 2)
 
-    def testForceReconfigure(self):
-        """The -f flag should force a rebuild"""
-        self._RunControl('-b', TEST_BRANCH, '-C', '-o', self._output_dir)
-        # Each commit has a config and make
-        self.assertEqual(self._make_calls, len(boards) * self._commits * 2)
-
     def testMrproper(self):
         """The -f flag should force a rebuild"""
         self._RunControl('-b', TEST_BRANCH, '-m', '-o', self._output_dir)
diff --git a/tools/buildman/kconfiglib.py b/tools/buildman/kconfiglib.py
index c67895c..b9f3756 100644
--- a/tools/buildman/kconfiglib.py
+++ b/tools/buildman/kconfiglib.py
@@ -556,6 +556,7 @@
 
 VERSION = (14, 1, 0)
 
+# pylint: disable=E1101
 
 # File layout:
 #
diff --git a/tools/buildman/main.py b/tools/buildman/main.py
index 0127106..3b6af24 100755
--- a/tools/buildman/main.py
+++ b/tools/buildman/main.py
@@ -30,8 +30,8 @@
 from patman import test_util
 
 def RunTests(skip_net_tests, verboose, args):
-    import func_test
-    import test
+    from buildman import func_test
+    from buildman import test
     import doctest
 
     result = unittest.TestResult()