LU-12130 test: pool inheritance for mdt component

LU-12130 test: pool inheritance for mdt component

test if the pool info is inherited for the mdt component,
what is not supposed to happen

Test-Parameters: testlist=sanity env=ONLY=65o
Change-Id: I07e15fe2979c2e8887024fb959af2926425d258a
HPE-bug-id: LUS-7180
Signed-off-by: Vitaly Fertman <vitaly.fertman@hpe.com>
Signed-off-by: Vladimir Saveliev <vlaidimir.saveliev@hpe.com>
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/46391
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Elena Gryaznova <elena.gryaznova@hpe.com>
Reviewed-by: Colin Faber <cfaber@ddn.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>