Registration Token Refactor (Abstract Factory) style fixes

src/main/java/app/coronawarn/verification/controller/ExternalTokenController.java

@@ -102,9 +102,9 @@ public DeferredResult<ResponseEntity<RegistrationToken>> generateRegistrationTok
 
     CovidTestIdentifierFactory covidTestIdentifierFactory = new CovidTestIdentifierFactoryImpl();
 
-    CovidTestIdentifier testIdentifier = covidTestIdentifierFactory.makeCOVIDTestIdentifier(request);
+    CovidTestIdentifier testIdentifier = covidTestIdentifierFactory.makeCovidTestIdentifier(request);
 
-    return testIdentifier.generateRegistrationToken
-      (request, scheduledExecutor, stopWatch, fake, appSessionService, fakeDelayService, tanService);
+    return testIdentifier.generateRegistrationToken(
+      request, scheduledExecutor, stopWatch, fake, appSessionService, fakeDelayService, tanService);
   }
 }

src/main/java/app/coronawarn/verification/factory/CovidTestIdentifierFactory.java

@@ -24,6 +24,6 @@
 
 public interface CovidTestIdentifierFactory {
 
-  public CovidTestIdentifier makeCOVIDTestIdentifier(RegistrationTokenRequest request);
+  public CovidTestIdentifier makeCovidTestIdentifier(RegistrationTokenRequest request);
 
 }

src/main/java/app/coronawarn/verification/factory/CovidTestIdentifierFactoryImpl.java

@@ -24,7 +24,7 @@
 
 public class CovidTestIdentifierFactoryImpl implements CovidTestIdentifierFactory {
   @Override
-  public CovidTestIdentifier makeCOVIDTestIdentifier(RegistrationTokenRequest request) {
+  public CovidTestIdentifier makeCovidTestIdentifier(RegistrationTokenRequest request) {
     switch (request.getKeyType()) {
       case GUID:
         return new GuidCovidTestIdentifier();

src/main/java/app/coronawarn/verification/factory/TeleTanCovidTestIdentifier.java

@@ -20,6 +20,8 @@
 
 package app.coronawarn.verification.factory;
 
+import static java.util.concurrent.TimeUnit.MILLISECONDS;
+
 import app.coronawarn.verification.domain.VerificationTan;
 import app.coronawarn.verification.exception.VerificationServerException;
 import app.coronawarn.verification.model.RegistrationToken;
@@ -36,7 +38,6 @@
 import org.springframework.http.ResponseEntity;
 import org.springframework.util.StopWatch;
 import org.springframework.web.context.request.async.DeferredResult;
-import static java.util.concurrent.TimeUnit.MILLISECONDS;
 
 @RequiredArgsConstructor
 @Slf4j