Increase disk size for GCE raw test.
Increase disk size for GCE raw test.

Change-Id: Iefcac25b88e3ea9c840099bf9425fb4ca385dc22

cloudendpoints/esp,cloudendpoints/esp,cloudendpoints/esp,cloudendpoints/esp,cloudendpoints/esp,cloudendpoints/esp,cloudendpoints/esp,cloudendpoints/esp