[BUGFIX] Let foodcritic exclude directories that confuse it

Unbelievable. What a mess.

Foodcritic/foodcritic#148

Otherwise FC complains as follows:

> FC011: Missing README in markdown format: spec/README.md:1
> FC031: Cookbook without metadata file: spec/metadata.rb:1
> FC045: Metadata does not contain cookbook name: spec/metadata.rb:1

src/org/typo3/chefci/v2/stages/Lint.groovy

@@ -19,7 +19,9 @@ class Lint extends AbstractStage {
 
     private def foodcritic(){
         script.node {
-            script.sh('foodcritic .')
+            // we have to manually disable these directories because foodcritic is stupid by default.
+            // https://github.com/acrmp/foodcritic/issues/148
+            script.sh('foodcritic . --exclude spec --exclude test')
         }
     }