knife ec2 server create should terminate the EC2 instance if the command fails

[NimishaS]

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knife ec2 server create should terminate the EC2 instance if the command fails

Specification

knife ec2 server create command may fail due to various reasons after the server creation e.g.

• if the runlist fails
• due to insufficient permissions (if --sudo isn't given)
  etc. etc.

As a user, it was an overhead for me to delete the EC2 instance manually afterwards.
Automation tools e.g. terraform rolls back the previous steps if something goes wrong. It would be good to have a similar behavior in knife-plugins too. However the comparison with terraform is not quite appropriate.

It would be good to have this design in other knife tools as well e.g. knife-azure, knife-google etc