spec: vendored_gems coverage result merge with canvas

Change-Id: Ic2bd9a9045da4aa417f60b66ef08ca9d470ec2bb
Reviewed-on: https://gerrit.instructure.com/30829
Tested-by: Jenkins <jenkins@instructure.com>
Reviewed-by: Bryan Madsen <bryan@instructure.com>
Product-Review: Bryan Madsen <bryan@instructure.com>
QA-Review: Bryan Madsen <bryan@instructure.com>