Fail build if code coverage cannot be sent

[awead]

Code coverage is not being sent to Code Climate. We're getting:

Error: json: cannot unmarshal object into Go struct field input.coverage of type []formatters.NullInt

This is probably due to a bug with Code Climate and the latest SimpleCov gem.

WDLL

• downgrade SimpleCov so that coverage reports work
• ensure any future builds with fail if the report is NOT sent to CC

[whereismyjetpack]

we exit with rpsec exit code in the script, we should probably set -e in the script so it bails on any failure?