[ticket/12786] Extend profilefield_base_migration.php class
* lucifer4o/ticket/12786:
[ticket/12786] Correcting some tabs
[ticket/12786] Array_merge instead copy array parts
[ticket/12786] Some changes of the comments.
[ticket/12786] Dixing a typo
[ticket/12786] Some minor fixes of comments and function naming
[ticket/12786] Add clean_cpf_db_entries
[ticket/12786] White spaces found
[ticket/12786] Add create_language_entries
[ticket/12786] Add get_custom_field_id
[ticket/12786] Extend profilefield_base_migration.php class