Initialize User Roles under CreateTenantAdminUser method.

Author: maliming

aspnet-core/src/AbpCompanyName.AbpProjectName.Core/Authorization/Users/User.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Collections.Generic;
 using Abp.Authorization.Users;
 using Abp.Extensions;
 
@@ -21,7 +22,8 @@ public static User CreateTenantAdminUser(int tenantId, string emailAddress)
                 UserName = AdminUserName,
                 Name = AdminUserName,
                 Surname = AdminUserName,
-                EmailAddress = emailAddress
+                EmailAddress = emailAddress,
+                Roles = new List<UserRole>()
             };
 
             user.SetNormalizedNames();