Disabled Pylint error messages for apply-reviews support script.
Disabled Pylint error messages for apply-reviews support script.

This disables the error messages we have seen on CentOS when the
version of Python running on the machine is older than 2.7.9. The
two error messages concern only Windows, thus the support script
requires Python >= 2.7.9 on that operating system to be used.

Review: https://reviews.apache.org/r/62864/

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