Remaining cases of MappingEngineTester
Remaining cases of MappingEngineTester

This patch fixes the remaining unit test cases
pending for the class MappingeEngineTester.

Change-Id: I466520017fe41869684b04636107f98f38a75b50
Related-bug: #1782197

openstack/keystone,mahak/keystone,openstack/keystone,openstack/keystone,mahak/keystone,mahak/keystone