The slow tests run unreliably with our current setup/infrsstructure/timeouts.
There are only five slow ones and having the other ~250 run reliably without timeouts
is the priority right now. We can revisit the slow tests at some later date if wanted.
(From OE-Core rev: 7469c2a5595337fc4407fa7a2ad06b5bf2347545)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>