Check return codes in test scripts

[keith-turner]

The test scripts should check the return codes of sub processes like sed. I think there may be a bash option that makes the script fail if any call fails. This will be useful with apache/fluo-muchos#53

[keith-turner]

http://stackoverflow.com/questions/821396/aborting-a-shell-script-if-any-command-returns-a-non-zero-value