New Scanner: Implement a SSH Server Scanner #54

Is your feature request related to a problem? Please describe.
As an user i want to use test my ssh-server (or already found ssh port) based on best practices and given security policies with the secureCodeBox.

Some Best Practices on the topic ssh hardening can be found here:

• https://linux-audit.com/audit-and-harden-your-ssh-configuration/
• https://infosec.mozilla.org/guidelines/openssh

Describe the solution you'd like
There are already some ssh security scanners like:

• https://github.com/arthepsy/ssh-audit
• https://github.com/mozilla/ssh_scan

Especially the mozilla ssh_scan seems to be a good candidate to implement.
It's well documented and has a active community. It supports JSON output and the possibility to add my own ssh check policy.

• See here for example video
• See here for example output
• See here for example policies

Additional context
A new ssh scanner could be combined with the existing port scanner (nmap) to check found ssh ports.

Steps to implement a new scanner

A general guide how to implement a new scanner is documented here

Must have

• Create a new public secureCodeBox repository for the scanner implementation
• Implement a new scanner microservice an reuse some of the existing stuff, if possible
• Check if there is a healthcheck for the microservice implemented
• Implement a new basic security process for the scanner
• Update the docker-compose files and integrate your new scanner there
• Update the user guide and developer guide
• Implement a integration test for the scanner here

Should have

• Update the CLI examples
• Update the Jenkins Pipeline examples
• Update the OpenShift Container Setup