Release 7.4.0: Added column 'uuid' for some tables and added it to the primary key and enhanced primary keys for some tables

[Guest]

Added 'uuid' and set as primary key for the following tables:
- genconf_attributes_strings
- genconf_attributes_bools
- updateTask
- prg_links
- prg_contacts_linkage
- prg_dlist
- del_dlist
- user_attribute
- infostoreReservedPaths
- user_setting_server

Set primary key for tables:
- ical_principal
- ical_ids
- vcard_ids
- vcard_principal