add integration tests

analytics-service/src/main/resources/application.yml

currency-service/src/main/resources/application.yml

docker-compose.yml

readme.md

transaction-service/src/main/resources/application.yml

user-service/pom.xml

...c/main/java/cz/muni/fi/obs/controller/UserController.java

.../java/cz/muni/fi/obs/controller/UserControllerAdvice.java

...n/java/cz/muni/fi/obs/data/repository/UserRepository.java

.../cz/muni/fi/obs/exceptions/ClientConnectionException.java

...in/java/cz/muni/fi/obs/http/TransactionServiceClient.java

.../main/java/cz/muni/fi/obs/service/UserAccountService.java

user-service/src/main/resources/application.yml

...c/main/resources/db/migration/V0__initialize_database.sql

...cz/muni/fi/obs/integration/ControllerIntegrationTest.java

...i/obs/integration/rest/UserControllerIntegrationTest.java

...st/java/cz/muni/fi/obs/repository/UserRepositoryTest.java

...src/test/java/cz/muni/fi/obs/service/UserServiceTest.java

user-service/src/test/resources/application-test.yml

user-service/src/test/resources/drop_all.sql