Move line-length check functionality to pylint

Currently, the length of a line is checked with pycodestyle, which does
not take into account pylint comments, e.g. disabling an error for one
line. Thus, errors can only be disabled per code block, as otherwise
lines would easily get too long. Pylint itself ignores the line length
error if it is caused by such comments.

Depends-On: 9326

Change-Id: Ib231e73fe73ddff7d9163afe607e7a26b95e6305

pycodestyle

 [pycodestyle]
-ignore = W503
+ignore = W503,E501

pylintrc

@@ -71,7 +71,6 @@ disable=
     too-many-instance-attributes,
     no-init,
     locally-disabled,
-    line-too-long,
     fixme