LU-16642 tests: improve sanity-sec test_61

LU-16642 tests: improve sanity-sec test_61

Improve sanity-sec test_61 by using a client-specific nodemap rather
than the default nodemap.

Lustre-change: https://review.whamcloud.com/50317
Lustre-commit: a7222127c7a6437e3f3561fc55f3dc4ba69a97e5

Signed-off-by: Sebastien Buisson <sbuisson@ddn.com>
Change-Id: Ie0c9e381e42a93d89558947dee9a60537cf01e65
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Sergey Cheremencev <scherementsev@ddn.com>
LU-16683 tests: fix sanity-sec test_61 for SSK

When SHARED_KEY is in use, nodemap specific shared keys must be loaded
explicitly because sanity-sec test_61 defines a nodemap dedicated to
the client.

Lustre-change: https://review.whamcloud.com/50476
Lustre-commit: 05e5cb0b0c07e15f51ce4e8fa26e12c178ab404a

Fixes: a7222127c7 ("LU-16642 tests: improve sanity-sec test_61")
Test-Parameters: trivial
Test-Parameters: testlist=sanity-sec env=ONLY=61
Test-Parameters: testlist=sanity-sec env=SHARED_KEY=true,ONLY=61
Signed-off-by: Sebastien Buisson <sbuisson@ddn.com>
Change-Id: I206205496352b6f36341c8b962bb7de4b71541d5
Reviewed-on: https://review.whamcloud.com/c/ex/lustre-release/+/50502
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>