Modify ConfigurationDTO to generalize Json files export and import

[lufe089]

I'm submitting a...

[ ] Regression (a behavior that used to work and stopped working in a new release)
[ ] Bug report  
[ x] Feature request
[ ] Documentation issue or request
[ ] Support request => Please do not submit support request here

Current behavior

The monitor module saves and reads json files which are saved by using the class ConfigurationIO.

Expected behavior

Inside the ConfigurationIO class there are methods to handle json files (load, save, read) that could be generalized to be used for other modules (different from the Configuration tasks).
Improve how these methods were developped to obtain a generic design.
The idea is that the IO module does not have any relation with any module that contains business logic. Only the dependency with the common module is allowed.