[RFR] Add module-scoped replicated_appliances fixture

[tpapaioa]

Added module-scoped multi-region appliance fixture replicated_appliances_modscope, and replaced the function-scoped with this new module-scoped fixture in the tests in cfme/tests/distributed/test_appliance_replication.py. Because the tests previously didn't have to worry about cleanup, I've also added some finalizers to remove provider and other records after each test.

{{ pytest: --long-running --use-provider complete -k 'test_replication_ or test_appliance_replicate_' cfme/tests/distributed/test_appliance_replication.py }}

[dajoRH]

I detected some fixture changes in commit e747dbc

The global fixture temp_appliance_preconfig_funcscope_rhevm was changed, but I didn't find where it's used.
The global fixture temp_appliance_preconfig_modscope_rhevm was changed, but I didn't find where it's used.
The global fixture temp_appliance_unconfig_modscope_rhevm was changed, but I didn't find where it's used.
The global fixture replicated_appliances is used in the following files:

• cfme/tests/cloud_infra_common/test_retirement.py
  • test_vm_retirement_from_global_region
• cfme/tests/services/test_service_catalogs_multi_region.py
  • remote_appliance

The global fixture replicated_appliances_modscope is used in the following files:

• cfme/tests/distributed/test_appliance_replication.py
  • test_appliance_replicate_between_regions
  • test_replication_connect_to_vm_in_region
  • test_appliance_replicate_zones
  • test_appliance_replicate_remote_down

Please, consider creating a PRT run to make sure your fixture changes do not break existing usage 😃