LTI tools will be able to request a caliper url to send
view events to. The duration will be used to log a page
view within canvas.
Test Plan:
* Install the test lti app http://lti-tool-provider.herokuapp.com/
* launch it and click the caliper link in the app
* the "total activity" time on the people page for that user
should increase by 5 minutes.
Change-Id: I1032b9e5cbb007c326e539d9e53c92e83d83b80d
Reviewed-on: https://gerrit.instructure.com/47851
Tested-by: Jenkins
Reviewed-by: Braden Anderson <braden@instructure.com>
Product-Review: Braden Anderson <braden@instructure.com>
QA-Review: Braden Anderson <braden@instructure.com>