LU-3289 gss: Cleanup gss print statements and comments

LU-3289 gss: Cleanup gss print statements and comments

Some minor cleanup of GSS messages and comments.

Signed-off-by: Jeremy Filizetti <jeremy.filizetti@gmail.com>
Change-Id: I9cf4e7d7189142b47c2fb9ab13428cb65bc08754
Reviewed-on: http://review.whamcloud.com/17602
Tested-by: Jenkins
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Sebastien Buisson <sbuisson@ddn.com>
Reviewed-by: John L. Hammond <john.hammond@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>