Don't log trace_params in tracing logger, because it already has all this data
Don't print span attrs, it can contain lots of headers
Save small part of the response into the span, if the response was a JSON string
Added JSON logging of trace details into a separate file (to not spam the main log with machine readable stuff)
Record part of the response into the span
Set duration attribute in server spans
Log 404 errors
Colorize the traces (each span slightly changes the color of the parent span)
Improve trace visualization with duration formatting and notes for request/response pairs
Tracing requests
Custom log factory adds all trace values as one log record parameter (it will be empty if trace values are empty, like in MainThread where there are no incoming requests)
[add] managers/certificate.py with CertificateManger class
[mv] creating self-signed certificate logic into CertificateManger class
[add] renew and days_before_expire methods to CertificateManger class
[mv] several certificate dependent constants to managers/certificate.py
[add] CherryPy BackgroundTask to invoke certificate check hourly (3600 secs)
[fix] tests
[fix] bug with txn timer clean (clean_txn_by_timeout, worker and invoking of it)
