Added remove stale queries function and fixed the weird consumer test

.../querystore/src/main/java/at/tuwien/querystore/Query.java

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

...service/src/test/java/at/tuwien/config/MariaDbConfig.java

...a/at/tuwien/listener/RabbitMqListenerIntegrationTest.java

...t/java/at/tuwien/service/QueueServiceIntegrationTest.java

...t/java/at/tuwien/service/StoreServiceIntegrationTest.java

...ice/rest-service/src/test/resources/weather/3_queries.sql

...es/src/main/java/at/tuwien/listener/DatabaseListener.java

...rc/main/java/at/tuwien/listener/MessageQueueListener.java

...ain/java/at/tuwien/listener/impl/MariadbListenerImpl.java

...in/java/at/tuwien/listener/impl/RabbitMqListenerImpl.java

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

...ices/src/main/java/at/tuwien/service/DatabaseService.java

.../src/main/java/at/tuwien/service/MessageQueueService.java

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

...main/java/at/tuwien/service/impl/DatabaseServiceImpl.java

...main/java/at/tuwien/service/impl/RabbitMqServiceImpl.java

...rc/main/java/at/tuwien/service/impl/StoreServiceImpl.java