Make shell scripts executible

Without +x, docker will not run the shell scripts and the containers
exit immediately.

Change-Id: I03ca231d6e46131a58c01fae0f9b65e0a3722d36
correct missing backslash in config-nova-controller.sh

Change-Id: I3d49c5647744fb7d4e13f2e1fb84dc62f0f7e2c6