backlog/207_212_fiware_service_path

This PR implements/fixes several backlog features and issues:

* Use the `fiware-servicePath` header (https://github.com/telefonicaid/fiware-connectors/issues/212)
* Common character set when naming persistence elements (https://github.com/telefonicaid/fiware-connectors/issues/207)
* The organization is not created in column mode anymore (https://github.com/telefonicaid/fiware-connectors/issues/181)
* Appropriate slash occurence treatment in fiware-servicePath (https://github.com/telefonicaid/fiware-connectors/issues/263)

After merging the PR https://github.com/telefonicaid/fiware-connectors/pull/261, this also includes:

* iot_support at tid dot es as official contact email in all the source file headers (https://github.com/telefonicaid/fiware-connectors/issues/260)

DO NOT MERGE YET
I'm seeing a lot of changes like this in this PR... I think it was already done in another PR. Maybe present PR branch should be "updated" with develop to remove this "noise"?