add LTI tools based on client_id values

[zqian]

Local LTI tool test instances are removed after weekly Canvas beta server reset and monthly Canvas test server reset. We need to run a script to automatically add those tools based on the client_id.

1. get a configurable list of T&L LTI tool test instances: (MyLA test/beta, CAE test/beta, CCM test/beta etc) and the corresponding LTI key client ids in Canvas prod
2. create a weekly cron job to add LTI tools into Canvas beta and test instances using Canvas API POST /api/v1/accounts/:account_id/external_tools or proper calls from UCF canvasapi library