Enable Authorization Testkit tests for reactive backend (#1063)

This update also makes sure that `DemandConsumer` completes immediately when there is no unconsumed demand.

Author: injectives

testkit-backend/src/main/java/neo4j/org/testkit/backend/messages/requests/SessionClose.java

@@ -129,7 +129,12 @@ private DemandConsumer( RxBlockingSubscriber<T> subscriber, AtomicLong unfulfill
             this.unfulfilledDemandCounter = unfulfilledDemandCounter;
 
             subscriber.getCompletionStage().whenComplete( this::onComplete );
-            if ( this.unfulfilledDemandCounter.get() > 0 )
+            long unfulfilledDemand = this.unfulfilledDemandCounter.get();
+            if ( unfulfilledDemand == 0 )
+            {
+                completedStage.complete( CompletionReason.REQUESTED_DEMAND_CONSUMED );
+            }
+            else if ( unfulfilledDemand > 0 )
             {
                 setupNextSignalConsumer();
             }

testkit-backend/src/main/java/neo4j/org/testkit/backend/messages/requests/StartTest.java

@@ -51,10 +51,9 @@ public class StartTest implements TestkitRequest
         REACTIVE_SKIP_PATTERN_TO_REASON.put( "^.*\\.TestSessionRun\\.test_raises_error_on_session_run$", skipMessage );
         REACTIVE_SKIP_PATTERN_TO_REASON.put( "^.*\\.TestTxRun\\.test_raises_error_on_tx(_func)?_run", skipMessage );
         REACTIVE_SKIP_PATTERN_TO_REASON.put( "^.*\\.TestTxRun\\.test_failed_tx_run_allows(_skipping)?_rollback", skipMessage );
+        REACTIVE_SKIP_PATTERN_TO_REASON.put( "^.*\\.TestAuthorizationV\\dx\\d\\.test_should_fail_with_auth_expired_on_run_using_tx_run$", skipMessage );
+        REACTIVE_SKIP_PATTERN_TO_REASON.put( "^.*\\.TestAuthorizationV\\dx\\d\\.test_should_fail_with_token_expired_on_run_using_tx_run$", skipMessage );
         skipMessage = "Requires investigation";
-        REACTIVE_SKIP_PATTERN_TO_REASON.put( "^.*\\.TestAuthorizationV4x1\\..*$", skipMessage );
-        REACTIVE_SKIP_PATTERN_TO_REASON.put( "^.*\\.TestAuthorizationV4x3\\..*$", skipMessage );
-        REACTIVE_SKIP_PATTERN_TO_REASON.put( "^.*\\.TestNoRoutingAuthorization\\..*$", skipMessage );
         REACTIVE_SKIP_PATTERN_TO_REASON.put( "^.*\\.TestDirectConnectionRecvTimeout\\..*$", skipMessage );
         REACTIVE_SKIP_PATTERN_TO_REASON.put( "^.*\\.TestRoutingConnectionRecvTimeout\\..*$", skipMessage );
         REACTIVE_SKIP_PATTERN_TO_REASON.put( "^.*\\.TestRoutingConnectionRecvTimeout\\.test_timeout$", skipMessage );