Minor script corrections

Getting this running on debian, I noticed that the reference to "sh" was actually breaking the script functionality.  As it turns out, debian actually has the bourne shell installed, rather than just symlinking it to bash. By changing the shell call to "bash" the script worked as expected.

The population script tries to hit collins at port 9000, but the default config has it listen on port 8080.  I know the port is configurable, but we may as well stick with defaults consistently.