gui: Fix remove module in system-config-selinux

When a user tried to remove a policy module with priority other than 400 via
GUI, it failed with a message:

libsemanage.semanage_direct_remove_key: Unable to remove module somemodule at priority 400. (No such file or directory).

This is fixed by calling "semodule -x PRIORITY -r NAME" instead of
"semodule -r NAME".

From Jono Hein <fredwacko40@hotmail.com>
Signed-off-by: Petr Lautrbach <plautrba@redhat.com>

gui/modulesPage.py

@@ -125,9 +125,10 @@ class modulesPage(semanagePage):
     def delete(self):
         store, iter = self.view.get_selection().get_selected()
         module = store.get_value(iter, 0)
+        priority = store.get_value(iter, 1)
         try:
             self.wait()
-            status, output = getstatusoutput("semodule -r %s" % module)
+            status, output = getstatusoutput("semodule -X %s -r %s" % (priority, module))
             self.ready()
             if status != 0:
                 self.error(output)