Switch off disable_api_termination on a bunch of ec2s in a terraform file

gistfile1.txt

A bunch of ec2s are created with disable_api_termination true which makes it really hard to kill them all when the time comes. 
This just changes all the disable_api_termination vars from true to false so they can easily `terraform destroy` 

```
find . -type f -name "app[[:digit:]]*.tf" | xargs sed -i '' 's/disable_api_termination     = true/disable_api_termination     = false/g'
terraform apply
```