MSP-11145
**NOTE: Failing specs**
Add a tool for reading `log/untested-payload.log` and
`framework.payloads` to determine `context`s to add
`spec/modules/payloads_spec.rb` to test the untested payloads.
MSP-11145
Extract the spec task action which errored out if
`log/untested-payloads.log` exists to
`Metasploit::Framework::Spec::UntestedPayloads.define_task`.