Add REST listener module

[ziccardi]

Is your feature request related to a problem? Please describe.
Currently JNRPE 3 has the ability to support multiple listener. Only TCP listener is actually implemented (NRPE protocol).
It would be useful to have JNRPE expose a REST interface to invoke the checks.

Describe the solution you'd like
Add a REST interface to invoke the commands.
Ideally OpenAPI should be used to self document.