IOSCHED: nuke test scheduler

Signed-off-by: poondog <markj338@gmail.com>
DEFCONFIG: disable some misc debugging

Signed-off-by: poondog <markj338@gmail.com>
IOSCHED: set default as DEADLINE

Signed-off-by: poondog <markj338@gmail.com>
DEFCONFIG: nuke USERSPACE governor

Signed-off-by: poondog <markj338@gmail.com>