Description of problem:
When upgrading from 6.2 to 6.3 the content_source_id parameter from hosts is moved from the hosts table to the katello_content_facets table. As seen in the satellite.log form an upgrade here:

---
 -- add_column(:katello_content_facets, :content_source_id, :integer)
 -- add_index(:katello_content_facets, :content_source_id)
 -- add_foreign_key(:katello_content_facets, :smart_proxies, {:name=>"katello_content_facets_content_source_id_fk", :column=>"content_source_id"})
 -- remove_foreign_key(:hosts, {:name=>"hosts_content_source_id_fk"})
 -- remove_index(:hosts, :content_source_id)
 -- remove_column(:hosts, :content_source_id)
---

The problem here is that it doesn't appear that the value set for the content_source_id parameter in the hosts table is migrated to the katello_content_facets table when the new column is created. All values in the new column are blank.

For example:
===
6.2.14 (before upgrade)
foreman=# select count(id) from hosts where content_source_id is null;
 count 
-------
    24
(1 row)

foreman=# select count(id) from hosts where content_source_id is not null;
 count 
-------
   105
(1 row)
===
6.3.1 (after upgrade)
foreman=# select count(id) from katello_content_facets where content_source_id is null;
 count 
-------
   117
(1 row)

foreman=# select count(id) from katello_content_facets where content_source_id is not null;
 count 
-------
     0
(1 row)
===

Actual results:
Table values are not migrated

Expected results:
Table values are migrated and kept