added basic structure for the microservice for handling electricity prices

.../src/main/java/cz/muni/fi/pa165/core/DataInitializer.java

...main/java/cz/muni/fi/pa165/core/common/DomainService.java

core/src/main/java/cz/muni/fi/pa165/core/device/Device.java

.../main/java/cz/muni/fi/pa165/core/device/DeviceMapper.java

...n/java/cz/muni/fi/pa165/core/device/DeviceRepository.java

...main/java/cz/muni/fi/pa165/core/device/DeviceService.java

...ain/java/cz/muni/fi/pa165/core/smartmeter/SmartMeter.java

...va/cz/muni/fi/pa165/core/smartmeter/SmartMeterMapper.java

...z/muni/fi/pa165/core/smartmeter/SmartMeterRepository.java

...a/cz/muni/fi/pa165/core/smartmeter/SmartMeterService.java

...ce4/src/main/java/cz/muni/fi/pa165/microservice4/App.java

...165/microservice4/electricityprices/ElectricityPrice.java

...ervice4/electricityprices/ElectricityPriceController.java

.../microservice4/electricityprices/ElectricityPriceDTO.java

...roservice4/electricityprices/ElectricityPriceService.java

...rvice4/electricityprices/ElectricityPriceServiceImpl.java

...ervice4/electricityprices/ElectricityPriceSetRequest.java

microservice4/src/main/resources/application.yml

microservice4/src/main/resources/banner.txt

...va/cz/muni/fi/pa165/model/dto/device/DeviceCreateDto.java