Mock server

# Approvals Required:
- [ ] @NahimNasser (Nahim)


# Stories
1. [MOB-1129] As a developer I want to mock out all API endpoints

# Notes
[MOB-1120]      Mocked
- Return the id of the new group of a successful API call to create a Facebook group, error otherwise. 
- Used in wires at: 6.1.1
- Parameters:   app-id = int, name = string, description = string, privacy = boolean, admin-id = int


[MOB-1182]      Mocked
- Invite Facebook friend to group, error otherwise. 
- Used in wires at: 6.0, 6.1.1, 6.2 
- POST /groups/invite/{group-id}/members 
- Parameters: member-id = int


[MOB-1029]     Mocked 
- Returns all the game groups that are associated with the app that the user is in, error otherwise. 
- Used in wires at: 6.0
- GET /groups                                                                                                   



[MOB-904]   Mocked
- Returns the friends that are edX users that are in the course indicated by course id
- Used in wires at: 3.0, 2.0, 2.2 
- GET: /friends/course/{course-id}                                                                              

[MOB-1183]   Mocked
- Returns all the friends that are edX users that are in the group 
- Used in wires at: 6.0
- GET: /friends/group/{group-id}


[MOB-971]    Mocked
- Returns all the courses the user has friends in:
- Used in wires at: 3.0
- GET: /courses/friends


[MOB-970]     Mocked 
- Sets the users TOC to share courses to True or False. Returns success or error. 
- Used in wires at: 8.0
- POST: courses/share_settings
- Parameters: share_courses = {boolean}


[MOB-976]
- Returns a file to be used to determine bandwidth:
- Used in wires at: 
- GET: /bandwidth