Adjust log analyzer ignore pattern to support both python2 and python3

[Junchao-Mellanox]

Description of PR

Summary:
When cast None type to int type, python3 and python2 show different error. In python2, it shows:

int() argument must be a string or a number, not 'NoneType'

While in python3 it shows:

int() argument must be a string, a bytes-like object or a number, not 'NoneType'

As thermalctd in master branch has been migrated to python3, and 201911 branch is still using python2, we need handle both cases when ignoring such error in log analyzer.

Type of change

• Bug fix
• Testbed and Framework(new/improvement)
• Test case(new/improvement)

Approach

What is the motivation for this PR?

Adjust log analyze ignore pattern to make it work with both python2 and python3

How did you do it?

Change the existing ignore pattern

How did you verify/test it?

Manual test

Any platform specific information?

N/A

Supported testbed topology if it's a new test case?

N/A

Documentation