This removes the dependencies xvfb and pytest-xvfb.
--splinter-headless can be used as a substitute for running tests in
headless mode.
[sunil: Edit description as running run-tests starts plinth in container]
[sunil: Retain the xauth command]
Signed-off-by: Sunil Mohan Adapa <sunil@medhas.org>
Reviewed-by: Veiko Aasa <veiko17@disroot.org>
Reviewed-by: Sunil Mohan Adapa <sunil@medhas.org>