LU-16457 tests: wait for remote sleep in sanity-pcc/101a

LU-16457 tests: wait for remote sleep in sanity-pcc/101a

Wait longer for the remote sleep command to start on the agent node.

Test-Parameters: trivial testlist=sanity-pcc env=ONLY=101a,ONLY_REPEAT=200
Signed-off-by: Andreas Dilger <adilger@whamcloud.com>
Change-Id: I5dcbd6a7127b3e17aa658c87f5c75874432dc353
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/49587
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Feng Lei <flei@whamcloud.com>
Reviewed-by: Sebastien Buisson <sbuisson@ddn.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>