getRegions and getAllRegions, error fix
getRegions and getAllRegions, error fix

- Implemented get_all_regions with new model
- Implemented get_region with new model
- Fix few HTTP return codes and messages
- Config file read is case sensitive
- Fix error in options_from_request when requests is null

SmartInfrastructures/FIWARELab-monitoringAPI,attybro/FIWARELab-monitoringAPI,SmartInfrastructures/FIWARELab-monitoringAPI,attybro/xifi-monitoringAPI,SmartInfrastructures/FIWARELab-monitoringAPI