test: Explicitly specify the examples.

Signed-off-by: Blaž Hrastnik <blaz.hrast@gmail.com>
slugbuilder, slugrunner: Set home to $HOME.

Signed-off-by: Blaž Hrastnik <blaz.hrast@gmail.com>
test: Increase test box sizes to 1GB of RAM.

Signed-off-by: Blaž Hrastnik <blaz.hrast@gmail.com>