Exclude error_logger output from info and error logs.

error_logger mainly contains progress and crash reports and we were
asked to remove those from logs that are supposed to be user-readable.

Change-Id: Ib8bd9ca378790bfc0eb4510f8339c094a0e4567a
Reviewed-on: http://review.couchbase.org/33018
Reviewed-by: Artem Stemkovski <artem@couchbase.com>
Tested-by: Artem Stemkovski <artem@couchbase.com>