Fail helper script when variables are unset (fixes #25) (#26)
Fail helper script when variables are unset (fixes #25) (#26)

In some environments (such as the WSL), variables like `$RANDOM` may be
unset, causing the script to proceed with mangled variables. This commit
prevents those errors by adding `set -u`, which will cause bash to abort
when a variable is used but unset.
terraform-google-modules/terraform-google-project-factory,terraform-google-modules/terraform-google-project-factory,terraform-google-modules/terraform-google-project-factory,terraform-google-modules/terraform-google-project-factory