Checkmk Werk 15375: service_group: alias field when creating is now required

ID: 15375 Title: service_group: alias field when creating is now required Component: REST API Level: 1 Class: Bug fix Version: 2.3.0b1 This werk fixes an issue whereby the alias was not previously a required field when creating service groups. This resulted in a an exception when attempting to create a service group without one. The alias field is now required.