LU-15910 tests: skip sanity/413g for SSK

When running sanity test_413g under review-dne-selinux-ssk-part-1
it intermittently fails.  Temporarily disable this subtest for
this config until the problem is understood and fixed.

Test-Parameters: trivial
Signed-off-by: Andreas Dilger <adilger@whamcloud.com>
Change-Id: Iacda6add8baabd479ea05dff06867f1a7afb23ce
Reviewed-on: https://review.whamcloud.com/47800
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Sebastien Buisson <sbuisson@ddn.com>
Reviewed-by: Lai Siyao <lai.siyao@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>