Merge pull request #7040 from edx/will/finish-linkedin

common/djangoapps/student/admin.py

...ent/migrations/0045_add_trk_partner_to_linkedin_config.py

common/djangoapps/student/models.py

common/djangoapps/student/tests/test_linkedin.py

common/djangoapps/student/tests/tests.py

common/djangoapps/student/views.py

...apps/certificates/management/commands/create_fake_cert.py

lms/djangoapps/certificates/tests/test_create_fake_cert.py

lms/static/images/linkedin_add_to_profile.png

lms/static/js/dashboard/legacy.js

lms/static/sass/multicourse/_dashboard.scss

...mplates/dashboard/_dashboard_certificate_information.html

lms/templates/dashboard/_dashboard_course_listing.html