LU-1095 debug: no console message for long symlink

LU-1095 debug: no console message for long symlink

Some minor fixups from running local sanity.sh tests:
- don't print a console message for long-but-legal symlinks,
  which could be hit during normal usage as well

Signed-off-by: Andreas Dilger <adilger@whamcloud.com>
Change-Id: I24e3e8ea9d8db0ca9c59597f3170f2b18359500c
Reviewed-on: http://review.whamcloud.com/3130
Tested-by: Hudson
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Yu Jian <yujian@whamcloud.com>
Reviewed-by: Li Wei <liwei@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>