Fix setup step failure for Java App Server layers

If I create a Java App Server layer with these settings:
 Java version: OpenJDK 7
 Java stack: Tomcat 7
 Java VM options: none
 Cutsom Chef Recipes: none

Instances started in this layer fail at the setup step. Log output is https://gist.github.com/amdg/8452033

This patch ensures that /usr/local/bin exists before creating a file inside it.