[BuildTools] ticket create permission revoked

[Stefan Vigerske]

Hi,

to stop the current spamming of BuildTools tickets, I removed 
ticket-create permissions for authenticated users for now. Only 
BuildTools project managers can create tickets for now. Of course we can 
grant permissions to more people, but that will be for specific logins only.
Everyone with an account should be able to comment on existing tickets.

Maybe I will just restore the permissions after a while.
If someone has an idea on how to avoid spamming, please let Matt know.

Stefan