backlog/207_212_fiware_service_path

This issue 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).

DO NOT MERGE YET
The length limitations are test in this new commit: https://github.com/telefonicaid/fiware-connectors/commit/86f76b2d805ea4c049f0f6eb5dfbcc18c77cff72

The character scaping was already tested in `OrionRestHanderTest.java`, lines 135 and 137.