docker integration test barebone

.../src/main/java/at/tuwien/endpoints/ContainerEndpoint.java

...ce/rest-service/src/test/java/at/tuwien/BaseUnitTest.java

...va/at/tuwien/service/ContainerServiceIntegrationTest.java

...test/java/at/tuwien/service/ContainerServiceUnitTest.java

...src/test/java/at/tuwien/service/ImageServiceUnitTest.java

...ava/at/tuwien/exception/ContainerNotRunningException.java

.../services/src/main/java/at/tuwien/mapper/ImageMapper.java

...ces/src/main/java/at/tuwien/service/ContainerService.java

...ervices/src/main/java/at/tuwien/service/ImageService.java

...src/main/java/at/tuwien/entities/container/Container.java

...va/at/tuwien/entities/container/image/ContainerImage.java