LU-3289 gss: Cleanup gss code

LU-3289 gss: Cleanup gss code

Address some lingering style and code issues that were commented on
but not fixed.

Signed-off-by: Nathaniel Clark <nathaniel.l.clark@intel.com>
Change-Id: I2396bf3a6a6e3621aa37fd5592eb9eeaeedb06e7
Reviewed-on: http://review.whamcloud.com/20727
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Reviewed-by: Sebastien Buisson <sbuisson@ddn.com>
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>