Remove MySQL specific code from site generation code

- site-generator is generic, so no changes.
 - removed mysql information from site.cfg.
 - Updated template files to call sqlite queries directly.
 - Renamed the query files - remove sqlite from file names.
 - Deleted MySQL specific template files.

templates/ids-correspondent.tpl.html

@@ -1,4 +1,4 @@
-<!--% USE DBI(constants.driver, constants.user, constants.password) %-->
+<!--% USE DBI(constants.driver) %-->
 <!--% FOREACH host IN DBI.query(
 	'select h.hostid from hosts as h'
 ) %-->