revert simplecov back to 0.9.2
revert simplecov back to 0.9.2

refs CNVS-32826

Change-Id: Ib1dd3f24c3d52827183f6c8dafa04ddce5aeb8dd
Reviewed-on: https://gerrit.instructure.com/93370
Reviewed-by: Cemal Aktas <92f142e4a145271fd784e7ddaa1fc1ff0aed3773@instructure.com>
Tested-by: Jenkins
Product-Review: Landon Wilkins <e219b0c23c4256074cdfc7a23138e4f17200b08f@instructure.com>
QA-Review: Landon Wilkins <e219b0c23c4256074cdfc7a23138e4f17200b08f@instructure.com>

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