* Prepend the year to each glog line (#516)

This PR fixes issue #516 by prepending the year to each glog line.

Previous format of each line in a log file:
[IWEF]mmdd hh:mm:ss.uuuuuu threadid file:line] msg

New format:
[IWEF]yyyymmdd hh:mm:ss.uuuuuu threadid file:line] msg

* Fix logging_unittest for PR #530

Since the format of each glog line has been changed,
the logging_unittest must also be updated.