Changes

Fix Bug 591: Fix 'jnlp.' aliasing of PropertyAccess.getProperty(..):

Usually you set a property like
  jogamp.debug.IOUtil
  jogamp.debug=all
to enable either IOUtil debugging or all debugging.

In case you use Applets or JNLP you cannot use above
property namespace, since it's considered insecure.
GlueGen would allow you to use an 'jnlp.' alias, e.g.:
  jnlp.jogamp.debug.IOUtil
  jnlp.jogamp.debug=all

The latter are secure properties and will be passed to the invoked JVM.

All properties requested by PropertyAccess.getProperty(..)
shall be aliased w/ 'jnlp.' (prepend 'jnlp.'),
if no value could be found with the given key.