[cbcollectinfo] don't skip hidden dirs and include inode #

In CBSE-1314 we suspect that incorrect estimation of disk usage by
couchbase is due to symlinks or hardlinks. But we haven't included
enough information to cbcollectinfo to be sure. Until now.

Change-Id: I5627782a7d26e5dab3bc2404f26749d86fd189e4
Reviewed-on: http://review.couchbase.org/40241
Tested-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Reviewed-by: Aliaksey Artamonau <aliaksiej.artamonau@gmail.com>