Release version 2.0.4

This is a bug fix release for some issues with running on HDP 2.2 and running HiveServer2 with the new init scripts.

• Fix ChefSpec ( Issue: #207 )
• Support HDP 2.1.15.0, 2.2.4.4, and 2.2.6.0 ( Issue: #208 )
• HiveServer2 process fix per @jsh2134 ( Issue: #210 )
• Fix HDP 2.2 yarn.application.classpath ( Issue: #211 )