fix cve-2023-32712

[hsekowski-splunk]

https://nvd.nist.gov/vuln/detail/CVE-2023-32712

Manual test shows fix is not needed by the solnlib side.
The test was done following way:

1. solnlib_demo_collector was modified by adding code as below:
   msg = "ASCII Table in one string: " for i in range(128): msg += chr(i) logger.info(msg)
2. In Splunk Enterprise Version:9.0.4.1 it gives log entry like
   04/08/2023 14:12:53.165 2023-08-04 14:12:53,165 INFO pid=1641 tid=MainThread file=solnlib_demo_collector.py:do_run:77 | ASCII Table in one string: \x00�������� � ������������������ !"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_abcdefghijklmnopqrstuvwxyz{|}~�
   host = custom-servernamesource = /opt/splunk/var/log/splunk/solnlib_demo_collector.logsourcetype = solnlib_demo_collector
   `
3. in Splunk Enterprise Version:9.1.0.2 it is
   04/08/2023 17:38:28.551 2023-08-04 17:38:28,551 INFO pid=15511 tid=MainThread file=solnlib_demo_collector.py:do_run:77 | ASCII Table in one string: \x00\x01\x02\x03\x04\x05\x06\x07\x08 \x0b\x0c \x0e\x0f\x10\x11\x12\x13\x14\x15\x16\x17\x18\x19\x1a\x1b\x1c\x1d\x1e\x1f !"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_abcdefghijklmnopqrstuvwxyz{|}~\x7f
   host = ip-172-31-44-228source = /opt/splunk/var/log/splunk/solnlib_demo_collector.logsourcetype = solnlib_demo_collector-2
   `

This issue is created to add automated test to the solnlib

[artemrys]

Done in #306