render login trailer on signup page
render login trailer on signup page

fixes CNVS-20054

Change-Id: Ie4572ca3e8efd1bb62c7c0c8e36eff19c66cbe86
Reviewed-on: https://gerrit.instructure.com/52968
Tested-by: Jenkins
Reviewed-by: Ethan Vizitei <73eeb0b2f65d05a906adf3b21ee1f9f5a2aa3c1c@instructure.com>
QA-Review: August Thornton <9adc7a1161ddf32ff608de792a7e50179545f026@instructure.com>
Product-Review: Cody Cutrer <c4fe2b1d90ef8f2548c8aeabfa633434316f0305@instructure.com>

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