Fail spec prepare task if sub command fails
Fail spec prepare task if sub command fails

In order to stop CI servers if one of the preparation tasks is
failing we need to pass the result to the invoking rake task.

robinboening/alchemy_cms,AlchemyCMS/alchemy_cms,mamhoff/alchemy_cms,AlchemyCMS/alchemy_cms,mamhoff/alchemy_cms,AlchemyCMS/alchemy_cms,robinboening/alchemy_cms,robinboening/alchemy_cms,mamhoff/alchemy_cms