Fix aliases

[hugoShaka]

Fix the postfix aliases, make the database query return good values.

• Un-skip the tests
• Add a function to add alias fixtures to the database like

  ansible-mailserver/test/suite/tools.py

  Lines 15 to 18 in 65cc658

  	ADD_ALIAS_DOMAIN_QUERY = """INSERT INTO virtual_alias_domains (source, destination)
  	VALUES (%s, %s)
  	ON CONFLICT DO NOTHING;"""

• Add the alias fixtures when creating the pytest server fixture

  ansible-mailserver/test/suite/test_smtp.py

  Lines 24 to 26 in 65cc658

  	tools.insert_virtual_domains(server_address, domains)
  	tools.insert_virtual_users(server_address, users)
  	tools.insert_virtual_alias_domains(server_address, alias_domains)

• Run the tests with molecule converge -s single and then molecule verify -s single