autoquery should use genshi transformer instead of its own template

[Jeff Hammel]

Currently, the AutoQueryPlugin uses a copy of the ticket.html from default trac. This is undesirable for a few reasons:

• other plugins depend on the correct value of filename and will fail if autoquery_ticket.html is returned

• the template may change and then there is an extra copy of the template is maintained

Renaming this to 'ticket.html' doesn't help, as this picks up the default ticket.html. Instead, just filter the stream

[Jeff Hammel]

if #3226 is done and this gets into to core, this ticket is obseleted

[Jeff Hammel]

obseleting, see #3226 and ​trac:#7562