CQS: gerrit integration

This is for Hannah to hook gerrit up with the test script for the client
app. Also, it scopes the selenium test in /spec/selenium/client_apps for
consistency.

  - canvas build task no longer installs production-only npm packages

Closes CNVS-15443

Change-Id: I0623b594782c55490e12dffdd379bf2baf5fb3a3
Reviewed-on: https://gerrit.instructure.com/40940
Reviewed-by: Hannah Bottalla <hannah@instructure.com>
Product-Review: Hannah Bottalla <hannah@instructure.com>
QA-Review: Hannah Bottalla <hannah@instructure.com>
Tested-by: Hannah Bottalla <hannah@instructure.com>
Tested-by: Jenkins <jenkins@instructure.com>