fix(realm): separate pool creation from realm creation helpers

Initialize only one pool per testcase.
Separate pool creation from realm creation helpers.
This fixes the bug where testcase creates 2 realms
and 2 pools, and first pool is lost and not cleaned up.

Signed-off-by: Shruti Gupta <shruti.gupta@arm.com>
Change-Id: I817e97ea5ef15510c18261689c5f5d4e0e65b054
9 files changed