Updates logging configuration samples

- Changed all formats to look more like the default formatters. This simplifies parsing
  in tools like logstash etc.
- Changed location of all log files to end up in /var/log instead of /tmp. /var/log is
  a better default than /tmp for log files.
- In wf_trace_conf_logging.conf.sample using separate formatters for different handlers.
  This accounts for the usecase of each handler having its own specific log format to
  reduce redundancy in log statements.

Change-Id: I467f4d493cd379c11cf7e5e872e4baa4faeac674
Closes-Bug: 1322740
Merge "Updates logging configuration samples"