Initialize logging configuration.
Log levels used by ERNIE:
- SEVERE: An event made it impossible to continue program execution.
WARNING: A potential problem occurred that requires the operator to
look after the otherwise unattended setup
- INFO: Messages on INFO level are meant to help the operator in
making sure that operation works as expected.
- FINE: Debug messages that are used to identify problems and which
are turned on by default.
- FINER: More detailed debug messages to investigate problems in more
detail. Not turned on by default. Increase log file limit when
using FINER.
- FINEST: Most detailed debug messages. Not used.