Do a better event re-injection and fix quotes in CKAN attrValues

This PR implements the issue https://github.com/telefonicaid/fiware-connectors/issues/52 which has been shown in https://github.com/telefonicaid/fiware-connectors/issues/103 (opened) and https://github.com/telefonicaid/fiware-connectors/issues/123 (closed)

This PR also fixes the issue described at https://github.com/telefonicaid/fiware-connectors/issues/106 (opened)