Integrate security scan tool Lynis with validation framework

Lynis is one of the mandatory security scan tools required for Akraino projects. The goal of this task is to integrate Lynis into validation framework so Akraino projects can run as part of the project validation process. 

Here is the link to the details about how to install/setup/run Lynis. 

https://wiki.akraino.org/display/AK/Steps+To+Implement+Security+Requirements#StepsToImplementSecurityRequirements-Lynis