[Customer] Deprecate customer_id in CustomerAddress

[paliarush]

1. customer_id is not needed as part of CustomerAddress, address ID (id) is unique identifier for the addresses
2. id is not needed as part of Customer because on server side it can be identified based on customer token used for authentication. There is no need to know customer ID on the client side.

Acceptance criteria:

• remove customer_id from CustomerAddress and id from Customer. Run web API tests to see if they stay green. Recover customer_id and id
• deprecate customer_id in CustomerAddress and id in Customer
• deprecated fields must return null all the time