spec: testbot gems

Change-Id: I6277b485f40dc584a1157952b2e3f305dfa6a462
Reviewed-on: https://gerrit.instructure.com/38216
Reviewed-by: Kyle Rosenbaum <kyler@instructure.com>
Product-Review: Kyle Rosenbaum <kyler@instructure.com>
QA-Review: Kyle Rosenbaum <kyler@instructure.com>
Tested-by: Kyle Rosenbaum <kyler@instructure.com>
Tested-by: Jenkins <jenkins@instructure.com>