fix debugging timeout hooks
fix debugging timeout hooks

as of recent byebug versions, `Byebug.started?` isn't defined until you
call debugger (or otherwise require 'byebug/core')

test plan:
1. jenkins should pass (it did before, inexplicably)
2. `rspec ./spec/lib/cuty_capt_spec.rb:64` should pass

Change-Id: I86879dba46565f0b6a97206456fe34c3cd265f09
Reviewed-on: https://gerrit.instructure.com/70206
Reviewed-by: Cody Cutrer <c4fe2b1d90ef8f2548c8aeabfa633434316f0305@instructure.com>
Tested-by: Jenkins
Product-Review: Jon Jensen <44f878afe53efc66b76772bd845eb65944ed8232@instructure.com>
QA-Review: Jon Jensen <44f878afe53efc66b76772bd845eb65944ed8232@instructure.com>

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