Removed dependencies on docker from identifier service

dbrepo-identifier-service/pom.xml

...t/java/at/tuwien/endpoint/IdentifierEndpointUnitTest.java

.../java/at/tuwien/endpoint/PersistenceEndpointUnitTest.java

...t/java/at/tuwien/gateway/QueryServiceGatewayUnitTest.java

...a/at/tuwien/service/IdentifierServiceIntegrationTest.java

...ce/rest-service/src/test/resources/application.properties

...r-service/rest-service/src/test/resources/init/schema.sql

...rvice/rest-service/src/test/resources/json/metadata0.json

...rvice/rest-service/src/test/resources/json/metadata1.json

.../src/main/java/at/tuwien/gateway/QueryServiceGateway.java

.../java/at/tuwien/gateway/impl/QueryServiceGatewayImpl.java

...ices/src/main/java/at/tuwien/mapper/IdentifierMapper.java

...ain/java/at/tuwien/repository/mdb/DatabaseRepository.java

...in/java/at/tuwien/service/impl/IdentifierServiceImpl.java