spec: bump rspec
spec: bump rspec

closer to 3.0, which we probably don't want to go to until
we can drop rspec 1 (rails 2)

Change-Id: I8affc4882bfc927a6d3b9bcc9c43fe5ab92cd3b7
Reviewed-on: https://gerrit.instructure.com/37326
Reviewed-by: Jon Jensen <44f878afe53efc66b76772bd845eb65944ed8232@instructure.com>
Tested-by: Jenkins <d95b56ce41a2e1ac4cecdd398defd7414407cc08@instructure.com>
Product-Review: Cody Cutrer <c4fe2b1d90ef8f2548c8aeabfa633434316f0305@instructure.com>
QA-Review: Cody Cutrer <c4fe2b1d90ef8f2548c8aeabfa633434316f0305@instructure.com>

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