Update annotations modules to use the course_id from the runtime, rather than extracting it from the page

common/lib/xmodule/xmodule/textannotation_module.py

@@ -81,6 +81,7 @@ class TextAnnotationModule(AnnotatableFields, XModule):
     def get_html(self):
         """ Renders parameters to template. """
         context = {
+            'course_id': self.runtime.course_id,
             'display_name': self.display_name_with_default,
             'tag': self.tags,
             'source': self.source,

common/lib/xmodule/xmodule/videoannotation_module.py

@@ -149,6 +149,7 @@ class VideoAnnotationModule(AnnotatableFields, XModule):
         extension = self._get_extension(self.sourceurl)
 
         context = {
+            'course_id': self.runtime.course_id,
             'display_name': self.display_name_with_default,
             'instructions_html': self.instructions,
             'sourceUrl': self.sourceurl,