fixes test expectation

Signed-off-by: Oleh Dokuka <odokuka@vmware.com>
Signed-off-by: Oleh Dokuka <oleh.dokuka@icloud.com>
Signed-off-by: OlegDokuka <odokuka@vmware.com>

Author: Oleh Dokuka

rsocket-core/src/test/java/io/rsocket/resume/ClientRSocketSessionTest.java

@@ -457,7 +457,7 @@ void shouldTerminateConnectionOnIllegalStateInKeepAliveFrame() {
           .typeOf(FrameType.ERROR)
           .matches(ReferenceCounted::release);
 
-      resumableDuplexConnection.onClose().as(StepVerifier::create).expectError().verify();
+      resumableDuplexConnection.onClose().as(StepVerifier::create).expectComplete().verify();
 
       transport.alloc().assertHasNoLeaks();
     } finally {