temporarily raise default_per_page on list courses
temporarily raise default_per_page on list courses

this endpoint was originally non-paginated. it was appropriate to make
it paginated (it was documented as paginated, and we cannot leave it
unpaginated), but we should have communicated and given a grace period
for endpoint consumers to prepare first.

temporarily raise the default per_page while they catch up.

fixes CNVS-11574

Change-Id: I853dadd9a093dac555d3a240aa64d275d040b29b
Reviewed-on: https://gerrit.instructure.com/31209
Reviewed-by: Simon Williams <088e16a1019277b15d58faf0541e11910eb756f6@instructure.com>
Tested-by: Jenkins <d95b56ce41a2e1ac4cecdd398defd7414407cc08@instructure.com>
Reviewed-by: Miles Wright <0bfe8ac2137ca0769e95282fc470b6005bdcbe84@instructure.com>
Product-Review: Rob Orton <7e09c9d3e96378bf549fc283fd6e1e5b7014cc33@instructure.com>
QA-Review: Rob Orton <7e09c9d3e96378bf549fc283fd6e1e5b7014cc33@instructure.com>

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