PyLint fixes for tools-webrtc and webrtc/tools

Fix a lot of errors before bringing in the new config in
https://codereview.webrtc.org/2737963003/

BUG=webrtc:7303
NOTRY=True

Review-Url: https://codereview.webrtc.org/2736233003
Cr-Commit-Position: refs/heads/master@{#17137}
diff --git a/tools-webrtc/check_package_boundaries.py b/tools-webrtc/check_package_boundaries.py
index eb791ff..ec1521b 100644
--- a/tools-webrtc/check_package_boundaries.py
+++ b/tools-webrtc/check_package_boundaries.py
@@ -39,7 +39,7 @@
     self.log_level = DISPLAY_LEVEL
     self.messages_left = messages_left
 
-  def log(self, build_file_path, line_number, target_name, source_file,
+  def Log(self, build_file_path, line_number, target_name, source_file,
           subpackage):
     if self.messages_left is not None:
       if not self.messages_left:
@@ -91,7 +91,7 @@
         line_number = subpackages_match.group('line_number')
         if subpackage:
           found_violations = True
-          logger.log(build_file_path, line_number, target_name, source_file,
+          logger.Log(build_file_path, line_number, target_name, source_file,
                      subpackage)
 
   return found_violations