Log error about failure to read log file.

Change-Id: I90e142330f8585e42023ec4650a25c43c8e51c82
Reviewed-on: http://review.couchbase.org/37893
Tested-by: Aliaksey Artamonau <aliaksiej.artamonau@gmail.com>
Reviewed-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Change log names in cbcollect_info.

Change-Id: I49f8a004d58c2458f8b9b49971467e0b2c6bc7e9
Reviewed-on: http://review.couchbase.org/37894
Tested-by: Aliaksey Artamonau <aliaksiej.artamonau@gmail.com>
Reviewed-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>