requested changes: upgrade to hapi-fhir-7.0.0-SNAPSHOT, removed empty JpaStarterWebsocketDispatcherConfig and references

unrequested changes: commons-logging dependency marked provided (to avoid redundant jar inclusion), removed unused imports in classes that were modified

src/test/java/ca/uhn/fhir/jpa/starter/ExampleServerDstu3IT.java

@@ -17,7 +17,6 @@ import org.apache.commons.io.FileUtils;
 import org.hl7.fhir.dstu3.model.*;
 import org.hl7.fhir.instance.model.api.IIdType;
 import org.junit.jupiter.api.BeforeEach;
-import org.junit.jupiter.api.Disabled;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.extension.ExtendWith;
 import org.springframework.beans.factory.annotation.Autowired;
@@ -31,8 +30,6 @@ import java.io.IOException;
 import java.net.URI;
 import java.util.Collection;
 import java.util.List;
-import java.util.concurrent.Future;
-import java.util.concurrent.TimeUnit;
 
 import static ca.uhn.fhir.util.TestUtil.waitForSize;
 import static org.junit.jupiter.api.Assertions.assertEquals;
@@ -43,7 +40,6 @@ import static org.junit.jupiter.api.Assertions.assertTrue;
 @SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT,
 	classes = {
 		Application.class,
-		JpaStarterWebsocketDispatcherConfig.class,
 		RepositoryConfig.class
 	}, properties =
   {