Don't pass --allow-superuser flags to a springboarded version of Meteor
Don't pass --allow-superuser flags to a springboarded version of Meteor

By removing the `--allow-superuser` and `--unsafe-perm` arguments before springboarding, it prevents older versions of Meteor from objecting to its use.  Catching it at the highest level should be sufficient to discourage root usage as intended in meteor/meteor#7821

Intended to fix...  meteor/meteor#7959

mjmasn/meteor,Hansoft/meteor,mjmasn/meteor,Hansoft/meteor,mjmasn/meteor,Hansoft/meteor,Hansoft/meteor,Hansoft/meteor,mjmasn/meteor,Hansoft/meteor,Hansoft/meteor,mjmasn/meteor,mjmasn/meteor,mjmasn/meteor