Set different debug levels for each module

[vikman90]

As a user, I need to be able to enable different levels of logging for each module.

For instance, debug-1 in FIM, debug-2 in Vulnerability Detector, and no debug logs in the rest of modules.

We may need to define a new option in each module, like <debug>. For instance:

<syscheck>
  <debug>1</debug>
</syscheck>
<vulnerability-detector>
  <debug>2</debug>
</vulnerability-detector>

The default level shall be 0.

Caveats

• Shall we be able to define a global debug level?
• Should this new option be changeable by the shared configuration?