User Data registration via UI doesn't honour the domain field

##### ISSUE TYPE

* Bug Report

##### COMPONENT NAME

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User Data
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##### CLOUDSTACK VERSION

4.19 (would be present from 4.18 - when managed user data service support was added)
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##### CONFIGURATION

##### OS / ENVIRONMENT

##### SUMMARY

Registration of user data in a specific domain i.e., by passing the domain in the UI , doesn't honour the domain id passed, rather creates the user data in the domain you are currently logged in to.

##### STEPS TO REPRODUCE

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1. Log in as Admin
2. Create a domain - domain1 under ROOT domain
3. As Admin in the ROOT domain context, register a user data and pass domain as /domain1
4. User data is registered but the domain appears as ROOT and not /domain1
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##### EXPECTED RESULTS

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User data be registered in the correct domain
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##### ACTUAL RESULTS

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User data created / registered in the domain in the current context
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Bắt đầu bằng cách tái hiện luồng đăng ký User Data trong UI: tạo domain1 dưới ROOT, sau đó đăng ký User Data từ ngữ cảnh ROOT trong khi truyền /domain1. Theo dõi điểm vào đăng ký trong UI và cách xử lý trường domain. Hoàn tất khi User Data được tạo trong domain1 thay vì domain ROOT hiện tại.

Do mô hình lập chỉ mục viết ra từ nội dung của issue.