CLOUDSTACK-7393: Expunging VM immediately and removing unncessary wait in test_vpc_vm_life_cycle.py

Signed-off-by: SrikanteswaraRao Talluri <talluri@apache.org>
(cherry picked from commit 402fc914cf4047b7faf1b1410972bb5a4ae5b29d)

Conflicts:
	test/integration/component/test_vpc_vm_life_cycle.py