test(sanity): stop sanity script when error is found

This commit add bash option "set -e" in the sanity
script, it will stop the script if an error is found.

tests/sanity/terraform_tests.sh

@@ -1,4 +1,5 @@
 #!/bin/bash
+set -e
 
 # Install the Latest version of Terraform
 sudo pip install ansible
@@ -8,12 +9,8 @@ terraform -version
 terraform init
 
 # Test Terraform syntax
-terraform validate \
-  -var "region=${AWS_REGION}" \
-  -var "name=nuke-all" \
-  -var "cloudwatch_schedule_expression=cron(0 4 ? * MON-FRI *)" \
-  -var "exclude_resources=glacier,eip,rds" \
-  -var "older_than=14d"
+export AWS_DEFAULT_REGION=eu-west-1
+terraform validate
 
 # Terraform lint
 terraform fmt -check -diff main.tf