tests: Correct the wrong import module for trans_hugepage_memory_stress

Should import utils under client but not under client.shared.

Signed-off-by: Yiqiao Pu <ypu@redhat.com>
shared.control: Update the stress_memory_heavy.control

Fix some variables missing problem and typo.

Signed-off-by: Yiqiao Pu <ypu@redhat.com>