Resolve error when --user-data-file option not provided

[orien]

Context

On later versions of ami_spec, there is an error when running the tool without the --user-data-file option:

Creating temporary AWS key pair: ami-spec-bd8f8b3e-7de4-4ddf-a631-757b7b03c67c
Creating AWS EC2 instance for ami-0cecf2bc129560938
Waiting for AWS EC2 instance to start: i-0b0c93b51604615b3
AWS EC2 instance started: i-0b0c93b51604615b3
Waiting for SSH…
Waiting for cloud init…
Running serverspec…
Terminating AWS EC2 instance: i-0b0c93b51604615b3
AWS EC2 instance terminated: i-0b0c93b51604615b3
Deleting temporary AWS key pair: ami-spec-bd8f8b3e-7de4-4ddf-a631-757b7b03c67c
bundler: failed to load command: ami_spec (/usr/local/bundle/bin/ami_spec)
/usr/local/bundle/bundler/gems/ami-spec-48b6eb410a60/lib/ami_spec/server_spec.rb:19:in `fetch': key not found: :user_data_file (KeyError)
	from /usr/local/bundle/bundler/gems/ami-spec-48b6eb410a60/lib/ami_spec/server_spec.rb:19:in `initialize'
	from /usr/local/bundle/bundler/gems/ami-spec-48b6eb410a60/lib/ami_spec.rb:106:in `new'
	from /usr/local/bundle/bundler/gems/ami-spec-48b6eb410a60/lib/ami_spec.rb:106:in `block in run'
	from /usr/local/bundle/bundler/gems/ami-spec-48b6eb410a60/lib/ami_spec.rb:91:in `each'
	from /usr/local/bundle/bundler/gems/ami-spec-48b6eb410a60/lib/ami_spec.rb:91:in `run'
	from /usr/local/bundle/bundler/gems/ami-spec-48b6eb410a60/lib/ami_spec.rb:202:in `invoke'
	from /usr/local/bundle/bundler/gems/ami-spec-48b6eb410a60/bin/ami_spec:5:in `<top (required)>'
	from /usr/local/bundle/bin/ami_spec:25:in `load'
	from /usr/local/bundle/bin/ami_spec:25:in `<top (required)>'
	from /usr/local/lib/ruby/3.2.0/bundler/cli/exec.rb:58:in `load'
	from /usr/local/lib/ruby/3.2.0/bundler/cli/exec.rb:58:in `kernel_load'
	from /usr/local/lib/ruby/3.2.0/bundler/cli/exec.rb:23:in `run'
	from /usr/local/lib/ruby/3.2.0/bundler/cli.rb:491:in `exec'
	from /usr/local/lib/ruby/3.2.0/bundler/vendor/thor/lib/thor/command.rb:27:in `run'
	from /usr/local/lib/ruby/3.2.0/bundler/vendor/thor/lib/thor/invocation.rb:127:in `invoke_command'
	from /usr/local/lib/ruby/3.2.0/bundler/vendor/thor/lib/thor.rb:392:in `dispatch'
	from /usr/local/lib/ruby/3.2.0/bundler/cli.rb:34:in `dispatch'
	from /usr/local/lib/ruby/3.2.0/bundler/vendor/thor/lib/thor/base.rb:485:in `start'
	from /usr/local/lib/ruby/3.2.0/bundler/cli.rb:28:in `start'
	from /usr/local/lib/ruby/gems/3.2.0/gems/bundler-2.4.6/libexec/bundle:45:in `block in <top (required)>'
	from /usr/local/lib/ruby/3.2.0/bundler/friendly_errors.rb:117:in `with_friendly_errors'
	from /usr/local/lib/ruby/gems/3.2.0/gems/bundler-2.4.6/libexec/bundle:33:in `<top (required)>'
	from /usr/local/bin/bundle:25:in `load'
	from /usr/local/bin/bundle:25:in `<main>'

Change

Resolve this problem with a fix to the ServerSpec class. This class does not use the iam_instance_profile_arn or user_data_file properties, so avoid fetching them from the options.