fix dsl precompiled nested classes

[byteit101]

class Java::JavafxSceneControl::ScrollPane
  include JRubyFX::DSL
  def hbar_policy=(rbenum)
    java_send "setHbarPolicy", [Java::JavafxSceneControl::ScrollBarPolicy],  JRubyFX::Utils::CommonConverters.parse_ruby_symbols(rbenum, Java::JavafxSceneControl::ScrollBarPolicy)
  end

is wrong, Java::JavafxSceneControl::ScrollBarPolicy => Java::JavafxSceneControl::ScrollPane::ScrollBarPolicy