Largely reduce the number of pylint warnings and fix one typo.

git_cl_hooks.py

Index: git_cl_hooks.py
diff --git a/git_cl_hooks.py b/git_cl_hooks.py
index 4519e422e37393751267b7b2b7d9ef830b505280..1ba66087ba2c4a547d87aa77d2837f1d635c284a 100644
--- a/git_cl_hooks.py
+++ b/git_cl_hooks.py
@@ -3,11 +3,10 @@
 # found in the LICENSE file.
 
 import os
-import re
 import subprocess
 import sys
 
-import breakpad
+import breakpad  # pylint: disable=W0611
 
 from git_cl_repo import git_cl
 from git_cl_repo import upload
@@ -25,11 +24,11 @@ def Backquote(cmd, cwd=None):
                           cwd=cwd,
                           stdout=subprocess.PIPE).communicate()[0].strip()
 
-def ConvertToInteger(input):
+def ConvertToInteger(inputval):
   """Convert a string to integer, but returns either an int or None."""
   try:
-    return int(input)
-  except TypeError, ValueError:
+    return int(inputval)
+  except (TypeError, ValueError):
     return None