feature/63

This PR implements the issue https://github.com/telefonicaid/fiware-connectors/issues/63

Tests:
* Successfully manually tested
Why do you need this checking? Is it due to the output of the `myql ... "show databases"` command it is not a "pure" list of databases and on the contrary include the "Database" token?

Maybe a sample outout of `myql ... "show databases"` would help to clarify.