ADDITIONAL SYSTEM INFORMATION :
Java Version: 1.8.0_161
Red Hat Enterprise Linux Server 7.3 (Maipo)
gnome-session 3.14.0


A DESCRIPTION OF THE PROBLEM :
When menu or submenu is specified in the .jnlp file of an application the generated Link in the menu is always in a folder named "Java WebStart" regardsless of the specified name for menu/submenu.
The same .jnlp file works under Windows 10, here the generated folder has the specified name.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Deploy a java application with a .jnlp containing the following shortcut block:

<shortcut>
  <desktop/>
  <menu submenu="Siemens"/>
</shortcut>

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
~/.config/menus/applications-merged/javaws.menu

<Menu>
  <Name>Applications</Name>
  <Menu>
    <Name>Siemens</Name>
    <Include>
      <Filename>jws_app_shortcut_1559723865944.desktop</Filename>
    </Include>
  </Menu>
</Menu>
ACTUAL -
~/.config/menus/applications-merged/javaws.menu:

<Menu>
  <Name>Applications</Name>
  <Menu>
    <Name>Java WebStart</Name>
    <Menu>
      <Name>Siemens</Name>
      <Include>
        <Filename>jws_app_shortcut_1559723865944.desktop</Filename>
      </Include>
    </Menu>
  </Menu>
</Menu>

FREQUENCY : always