Fix ordering issues with composed classes

The top level java module was declaring classes depending on what Java
distribution is required.  Similar to the issues encountered with
service and configuration class ordering, the composed classes did not
have an established relationship with other things that require the
module.

This change brings all resources into a single top level java class and
eliminates class composition within the module entirely.

manifests/init.pp

@@ -25,17 +25,9 @@ class java(
   $version_real      = $version
   $distribution_real = $distribution
 
-  case $distribution_real {
-    jre: {
-      class { 'java::jre_package':
-        version => $version_real,
-      }
-    }
-    jdk: {
-      class { 'java::jdk_package':
-        version => $version_real,
-      }
-    }
+  package { 'java':
+    ensure => $version_real,
+    name   => "${distribution_real}",
   }
 
 }