Implemented metric: Machine-readable indication of a license.
- Added the licensing dimension and the machine-readable metric to the dqm ontology.
- Removed redundant code from class HTTPSDataAccess, which determined dataset's URI.
- Changed access mode of method LowLatency.extractDatasetURI to public (should be moved to a commons class).
- Implemented the MachineReadableLicense metric and the respective Unit Test.
- Tiny fix in documentation of TimelinessOfResourceTest.