LU-16440 tests: recovery-double-scale typo fix

LU-16440 tests: recovery-double-scale typo fix

Fix the typo.

Fixes: f8e56a25cfc3 ("LU-15412 tests: Let init_clients_lists() export client vars")
Test-Parameters: trivial testlist=recovery-double-scale
Signed-off-by: Elena Gryaznova <elena.gryaznova@hpe.com>
HPE-bug-id: LUS-11422
Change-Id: I91a0c545f1eb82e6b502d9b0dc434fdb174db295
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/49544
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: xinliang <xinliang.liu@linaro.org>
Reviewed-by: Oleg Drokin <green@whamcloud.com>