Add auditor role/user for extended pgaudit (#481)

Author: eberlep

api/v1/postgres_types.go

@@ -576,6 +576,8 @@ func (p *Postgres) ToUnstructuredZalandoPostgresql(z *zalando.Postgresql, c *cor
 	// Create database owner
 	z.Spec.Users = make(map[string]zalando.UserFlags)
 	z.Spec.Users[ownerName] = zalando.UserFlags{"createdb", "createrole"}
+	// Add auditor user
+	z.Spec.Users["auditor"] = zalando.UserFlags{"nologin"}
 
 	// Create default database
 	z.Spec.Databases = make(map[string]string)