Move models from common to cms.

Add unit tests.

cms/djangoapps/models/settings/course_details.py

@@ -17,7 +17,6 @@ class CourseDetails:
         self.syllabus = None    # a pdf file asset
         self.overview = ""      # html to render as the overview
         self.intro_video = None    # a video pointer
-        self.intro_video_loc = None    # a video pointer
         self.effort = None      # int hours/week
 
     @classmethod
@@ -58,7 +57,6 @@ class CourseDetails:
         temploc = temploc._replace(name='video')
         try:
             course.intro_video = get_modulestore(temploc).get_item(temploc).definition['data']
-            course.intro_video_loc = temploc
         except ItemNotFoundError:
             pass
         

cms/djangoapps/models/settings/course_faculty.py

@@ -0,0 +1,22 @@
+from xmodule.modulestore import Location
+class CourseFaculty:
+    def __init__(self, location):
+        if not isinstance(location, Location):
+            location = Location(location)
+        # course_location is used so that updates know where to get the relevant data
+        self.course_location = location
+        self.first_name = ""
+        self.last_name = ""
+        self.photo = None
+        self.bio = ""
+        
+        
+    @classmethod
+    def fetch(cls, course_location):
+        """
+        Fetch a list of faculty for the course
+        """
+        if not isinstance(course_location, Location):
+            course_location = Location(course_location)
+            
+        # Must always have at least one faculty member (possibly empty)