LU-8602 gss: get rid of cfs_crypto_hash_desc

LU-8602 gss: get rid of cfs_crypto_hash_desc

Get rid of cfs_crypto_hash_desc, and use ahash_request instead.

Test-Parameters: testlist=sanity-sec envdefinitions=SHARED_KEY=true
Signed-off-by: Sebastien Buisson <sbuisson@ddn.com>
Change-Id: If47f5e66846459e8951779f4c6db22a9e4cf23a8
Reviewed-on: https://review.whamcloud.com/33493
Reviewed-by: James Simmons <uja.ornl@yahoo.com>
Reviewed-by: John L. Hammond <jhammond@whamcloud.com>
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>