Aspera fix Backend tests since a new build on 11.X

Error
Expecting:
 <"org.nuxeo.ecm.automation.OperationNotFoundException: No operation was bound on ID: Unknown Operation">
to start with:
 <"No such operation Unknown Operation">
Stacktrace
java.lang.AssertionError: 
Expecting:
 <"org.nuxeo.ecm.automation.OperationNotFoundException: No operation was bound on ID: Unknown Operation">
to start with:
 <"No such operation Unknown Operation">
	at com.nuxeo.aspera.connector.service.TestTransferService.lambda$iCanReadErrorsFromComplete$0(TestTransferService.java:227)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1541)
	at com.nuxeo.aspera.connector.service.TestTransferService.iCanReadErrorsFromComplete(TestTransferService.java:224)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:566)
	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:59)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:56)
	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
	at org.nuxeo.runtime.test.runner.FeaturesRunner$BeforeMethodRunStatement.evaluate(FeaturesRunner.java:396)
	at org.nuxeo.runtime.test.runner.FeaturesRunner$BeforeSetupStatement.evaluate(FeaturesRunner.java:410)
	at org.nuxeo.runtime.test.runner.FeaturesRunner.evaluateRunnable(FeaturesRunner.java:267)
	at org.nuxeo.runtime.test.runner.FeaturesRunner$AfterMethodRunStatement.evaluate(FeaturesRunner.java:432)
	at org.nuxeo.runtime.test.runner.FeaturesRunner.evaluateRunnable(FeaturesRunner.java:267)
	at org.nuxeo.runtime.test.runner.FeaturesRunner$AfterTeardownStatement.evaluate(FeaturesRunner.java:445)
	at org.nuxeo.runtime.test.runner.FeaturesRunner$RulesFactory$1.evaluate(FeaturesRunner.java:515)
	at org.nuxeo.runtime.test.runner.RuntimeDeployment$DeploymentStatement.evaluate(RuntimeDeployment.java:326)
	at com.github.tomakehurst.wiremock.junit.WireMockRule$1.evaluate(WireMockRule.java:73)
	at org.nuxeo.runtime.test.runner.FeaturesRunner$RulesFactory$1.evaluate(FeaturesRunner.java:515)
	at com.github.tomakehurst.wiremock.junit.WireMockRule$1.evaluate(WireMockRule.java:73)
	at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)