Deprecate create_jobject parameter on activity.py - Fixes #3450

As the ticket describe, create a object in the Journal
is no longer optional. The change do not break activities,
because the optional parameter is not removed, just ignored.

src/sugar3/activity/activity.py

@@ -296,8 +296,9 @@ class Activity(Window, Gtk.Container):
             presence service which *may* provide sharing for this
             application
         create_jobject (boolean)
-            define if it should create a journal object if we are
+            DEPRECATED: define if it should create a journal object if we are
-            not resuming
+            not resuming. The parameter is ignored, and always  will
+            be created a object in the Journal.
 
         Side effects:
 
@@ -407,7 +408,7 @@ class Activity(Window, Gtk.Container):
         self.shared_activity = None
         self._join_id = None
 
-        if handle.object_id is None and create_jobject:
+        if handle.object_id is None:
             logging.debug('Creating a jobject.')
             self._jobject = self._initialize_journal_object()
 
@@ -426,10 +427,6 @@ class Activity(Window, Gtk.Container):
                                                   warn_if_none=False)
             self._set_up_sharing(mesh_instance, share_scope)
 
-        if not create_jobject:
-            self.set_title(get_bundle_name())
-            return
-
         if self.shared_activity is not None:
             self._jobject.metadata['title'] = self.shared_activity.props.name
             self._jobject.metadata['icon-color'] = \
@@ -571,8 +568,8 @@ class Activity(Window, Gtk.Container):
             int: the activity id of the current instance of your activity.
 
             The activity id is sort-of-like the unix process id (PID). However,
-            unlike PIDs it is only different for each new instance (with
+            unlike PIDs it is only different for each new instance
-            create_jobject = True set) and stays the same everytime a user
+            and stays the same everytime a user
             resumes an activity. This is also the identity of your Activity to
             other XOs for use when sharing.
         '''