Fix parallel mode exiting with wrong exit code
Fix parallel mode exiting with wrong exit code

joel-airspring/nightwatch,awatson1978/nightwatch,nightwatchjs/nightwatch,miguelangelrr6/originnightwatch,joel-airspring/nightwatch,CoderK/nightwatch,iabw/nightwatch,campbellwmorgan/nightwatch,Crunch-io/nightwatch,mobify/nightwatch,campbellwmorgan/nightwatch,Crunch-io/nightwatch,nightwatchjs/nightwatch,beatfactor/nightwatch