Bok Choy tests for the split payment and verification flow

Adds mode creation endpoint to course_modes app and ability to bypass media device access prompt when proceeding through verification flow in a testing environment.

lms/static/js/verify_student/pay_and_verify.js

@@ -70,6 +70,12 @@ var edx = edx || {};
                 platformName: el.data('platform-name'),
                 requirements: el.data('requirements')
             },
+            'face-photo-step': {
+                platformName: el.data('platform-name')
+            },
+            'id-photo-step': {
+                platformName: el.data('platform-name')
+            },
             'review-photos-step': {
                 fullName: el.data('full-name'),
                 platformName: el.data('platform-name')
@@ -79,12 +85,6 @@ var edx = edx || {};
                 courseStartDate: el.data('course-start-date'),
                 coursewareUrl: el.data('courseware-url'),
                 platformName: el.data('platform-name')
-            },
-            'face-photo-step': {
-                platformName: el.data('platform-name')
-            },
-            'id-photo-step': {
-                platformName: el.data('platform-name')
             }
         }
     }).render();

lms/static/js/verify_student/views/webcam_photo_view.js

@@ -25,7 +25,14 @@
 
                     // Start the capture
                     this.getUserMediaFunc()(
-                        { video: true },
+                        {
+                            video: true,
+
+                            // Specify the `fake` constraint if we detect we are running in a test
+                            // environment. In Chrome, this will do nothing, but in Firefox, it will
+                            // instruct the browser to use a fake video device.
+                            fake: window.location.hostname === 'localhost'
+                        },
                         _.bind( this.getUserMediaCallback, this ),
                         _.bind( this.handleVideoFailure, this )
                     );