Crash in key generation with m2crypto

[tomato42]

Bug Report

System Information

Type	Version/Name
Operating System Name	Ubuntu
Operating System Version	22.04
Python version	3.8.16
tlslite-ng version	0.8.0a43
tlsfuzzer revision	0e48d57

Problem description

Failure in key generation during self-tests

Describe how to reproduce the problem

(if the issue is interaction with some other system/library/application,
please provide relevant version numbers or commit IDs of it too.)

Steps to reproduce the behaviour:

1. schedule a lot of runs with m2crypto installed

Expected behaviour

no failures

Include errors or backtraces

Traceback (most recent call last):
  File "/home/runner/work/tlsfuzzer/tlsfuzzer/tests/test_tlsfuzzer_messages.py", line 1509, in test_generate_with_mismatched_CR_TLS1_3

    priv_key = generateRSAKey(2048)
  File "/opt/hostedtoolcache/Python/3.8.16/x64/lib/python3.8/site-packages/tlslite/utils/keyfactory.py", line 36, in generateRSAKey
    return OpenSSL_RSAKey.generate(bits)
  File "/opt/hostedtoolcache/Python/3.8.16/x64/lib/python3.8/site-packages/tlslite/utils/openssl_rsakey.py", line 118, in generate
    key.rsa = m2.rsa_generate_key(bits, 3, f)
M2Crypto.RSA.RSAError: Unknown error in function rsa_generate_key.

Additional context

Add any other context about the problem here.