Refactored cloud_tenant_controller_spec
Refactored cloud_tenant_controller_spec

Replaces mocking of Classification with FactoryGirl tagging
Let variables are used instead of @variables

ManageIQ/manageiq-ui-classic,ManageIQ/manageiq-ui-classic,ManageIQ/manageiq-ui-classic,ManageIQ/manageiq-ui-classic