[0022] Fixed DB errors

This fixes the numerous DB errors shown in log file when starting the
server. Most of the errors came from orphan content (probably from a
missed TBC/UDB backport), when relevant, the missing content was added
or fixed. Please, see the SQL update file for the complete list of what
was fixed (and how).

Note: the errors related to the condition table are not fixed by this
commit. They will be handle later. However, those errors have no impact
on server.
[0023] Fixed DB errors generated by conditions table

* Removed TBC only condition entries from conditions table (based on DB
error log of previous revision of the DB, mentionning conditions
related to quest/item/faction/spell not available in classic)
* Removed condition entries from conditions table that are dependant of
conditions entries deleted by the above fix and thus become irrelevant