Fix Version/s: Exasol 7.1.0
The database can run on different timezone settings. The definition of recognized timezones can change according to the database provided by iana.org.
These changes could invalidate previously existing timezones.
If the database timezone setting is invalid (doesn't exist) then the logserver will crash with a SIGSEGV.
The logserver is now robust to invalid timezones and operates internally in UTC.