Revert of PyLint fixes for tools-webrtc and webrtc/tools (patchset #3 id:40001 of https://codereview.webrtc.org/2736233003/ )

Reason for revert:
Fails video quality tests in Chrome:  http://build.chromium.org/p/chromium.webrtc.fyi/builders/Win10%20Tester/builds/6568
I should have looked more closer at those :(

Original issue's description:
> 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}
> Committed: f5318e1f39

TBR=oprypin@webrtc.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=webrtc:7303

Review-Url: https://codereview.webrtc.org/2737233003
Cr-Commit-Position: refs/heads/master@{#17142}

tools-webrtc/check_package_boundaries.py

@@ -39,7 +39,7 @@ class Logger(object):
     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 @@ def _CheckBuildFile(build_file_path, packages, logger):
         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