Fixed submitting multiple coverage reports per test run
Fixed submitting multiple coverage reports per test run

refs https://github.com/TryGhost/Toolbox/issues/395

- I think we regressed somewhere along the line here, but we seem to be
  submitting two test coverage reports for the Admin tests and the unit
  tests
- I'm not sure if this fixes the random issues we've been seeing with
  -5%/+14% coverage bumps but it should clean this issue up first

TryGhost/Ghost,TryGhost/Ghost,TryGhost/Ghost