Pass class ID from student page to student attendance page

[aketcham0691]

The class ID selected by the student has to be passed to the attendance page for that class in order to query the database for attendance information.

[aketcham0691]

Testing:

• [ ] Open the website at https://aketcham0691.github.io/CSE442/
• [ ] Login using the following credentials by clicking on the "log in" button: -- Username: jim -- Password: testing
• [ ] You will be redirected to the student home page. Click "My Courses" and select ANDY 101
• [ ] You will be redirected to the attendance for the ANDY 101 class. In the URL, note the "courseId=1543245838126" at the end of the URL
• [ ] In a new tab, navigate to https://console.firebase.google.com/u/0/project/qrattendance-ff437/database/qrattendance-ff437/data and navigate to the attendance for the course ID shown in the attendance page URL.
• [ ] Verify that this class is ANDY 101 by expanding the node at this courseID