LU-9593 tests: remove sanity-sec tests from ALWAYS_EXCEPT

LU-9593 tests: remove sanity-sec tests from ALWAYS_EXCEPT

sanity-sec tests 2, 5 and 6 no longer exist. Test 2 was
removed by LU-6971 patch change ID I06f4348b. Tests
5 and 6 were removed by LU-3105 patch change I865a92b57.

Remove sanity-sec tests 2, 5 and 6 from the ALWAYS_EXCEPT
list.

Test-Parameters: trivial testlist=sanity-sec

Signed-off-by: dilip krishnagiri <dilipx.krishnagiri@intel.com>
Change-Id: Ia0377ff0da41c4ba9df6c90bc26f0469cb9de9a6
Reviewed-on: https://review.whamcloud.com/27411
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: James Nunez <james.a.nunez@intel.com>
Reviewed-by: Chris Hanna <hannac@iu.edu>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>