Update pfc_gen_t2.py

[harsgoll]

While running PFCWD test cases, encountered concatenation issue on sonic fanout.

root@xx37-root-fanout:/tmp# sudo nice --20 python pfc_gen_t2.py -p 16 -t 65535 -s 8 -n 1000000 -i Ethernet152 -r 1.76.0.62 Traceback (most recent call last):
File "/tmp/pfc_gen_t2.py", line 340, in
main()
File "/tmp/pfc_gen_t2.py", line 264, in main
fo_logger.debug(fo_str + ' sendmmsg got errno ' + str(errno) + ' for socket ' + s.getsockname()) TypeError: can only concatenate str (not "tuple") to str

We converted s.getsockname() into str and able to proceed further.

Cc: sanjair-git, @rraghav-cisco

Description of PR

Summary:
Fixes # (issue)

Type of change

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

Back port request

• 201911
• 202012
• 202205
• 202305

Approach

What is the motivation for this PR?

How did you do it?

How did you verify/test it?

Any platform specific information?

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

Documentation

[mssonicbld]

The pre-commit check detected issues in the files touched by this pull request.
The pre-commit check is a mandatory check, please fix detected issues.

Detailed pre-commit check results:
trim trailing whitespace.................................................Passed
fix end of files.........................................................Passed
check yaml...........................................(no files to check)Skipped
check for added large files..............................................Passed
check python ast.........................................................Passed
flake8...................................................................Failed
- hook id: flake8
- exit code: 1

tests/common/helpers/pfc_gen_t2.py:264:121: E501 line too long (121 > 120 characters)
tests/common/helpers/pfc_gen_t2.py:305:121: E501 line too long (121 > 120 characters)

flake8...............................................(no files to check)Skipped
check conditional mark sort..........................(no files to check)Skipped

To run the pre-commit checks locally, you can follow below steps:

1. Ensure that default python is python3. In sonic-mgmt docker container, default python is python2. You can run
   the check by activating the python3 virtual environment in sonic-mgmt docker container or outside of sonic-mgmt
   docker container.
2. Ensure that the pre-commit package is installed:

sudo pip install pre-commit

3. Go to repository root folder
4. Install the pre-commit hooks:

pre-commit install

5. Use pre-commit to check staged file:

pre-commit

6. Alternatively, you can check committed files using:

pre-commit run --from-ref <commit_id> --to-ref <commit_id>

[rraghav-cisco]

@sanjair-git : Pls review.