rhel7: Multiple errors are recorded when desktop starts up.

Issue

• Errors below are recorded when desktop starts up:

  gnome-session: Gjs-Message: JS WARNING: [resource:///org/gnome/shell/ui/extensionSystem.js 301]: octal literals and octal escape sequences are deprecated
  
  gnome-session: Gjs-Message: JS WARNING: [resource:///org/gnome/shell/gdm/loginDialog.js 1017]: anonymous function does not always return a value
  
  gnome-session: (gnome-settings-daemon:8547): media-keys-plugin-WARNING **: Unable to inhibit keypresses: GDBus.Error:org.freedesktop.DBus.Error.AccessDenied: Permission denied
  
  gnome-session: Gjs-Message: JS WARNING: [/usr/share/gnome-shell/extensions/launch-new-instance@gnome-shell-extensions.gcampax.github.com/extension.js 9]: assignment to undeclared variable _activateOriginal
  
  gnome-session: (nautilus:6154): Gtk-WARNING **: gtk_widget_size_allocate(): attempt to allocate widget with width -15 and height 34
  
  gnome-session: (gnome-shell:5943): mutter-WARNING **: STACK_OP_ADD: window 0x1a00001 already in stack
  
  gnome-session: Failed to play sound: File or data not found.