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
Fixed in https://github.com/telefonicaid/fiware-connectors/commit/288fa4fb06b46732d0a4678b63c123b7d55546cd