Bad parameters result in stack trace.

[aug24]

It would be nice to handle the stack trace and just print the message.

Generation failed: Unknown module: 'apt-updates'
java.lang.IllegalArgumentException: Unknown module: 'apt-updates'
	at com.gu.devenv.modules.Modules$.getModuleContribution(Modules.scala:79)
	at com.gu.devenv.modules.Modules$.applyModules$$anonfun$1(Modules.scala:46)
	at cats.data.Chain$.loop$4$$anonfun$1(Chain.scala:1211)
	at cats.Eval$.loop$1(Eval.scala:340)
	at cats.Eval$.cats$Eval$$$evaluate(Eval.scala:386)
<snip>

[adamnfish-gu]

💯

For sure, this is a bug that we should fix 👍

It's worth noting that there's a PR in progress that will properly integrate loading modules (with error handling), so that work will go some way towards resolving this bug as well.

#25 (review)