Goal: 

• Users should be able to set a custom TenantName and TenantDomainName in the octavia-operator
• These parameters will be used by the operator to authenticate against the Openstack APIs
• The resources originally created by the operator in the "service" tenant will be create in this custom tenant
• The operator still uses the "octavia" user in the "Default" domain
• The "octavia" service user should have the "admin" and "service" role in this custom tenant

Acceptance Criteria:

• Neutron resources, Glance Image, etc... are created in this tenant (note: the octavia-provider-network belongs to the admin tenant)