optable-targeting: fix NoBids test to use a bid-less response

The test named for the NOBID branch stubbed a bid response that has a bid,
so with non-empty targeting the validator returned SUCCESS and the test
exercised the full enrichment chain instead of the signature-only one.

Author: justadreamer

extra/modules/optable-targeting/src/test/java/org/prebid/server/hooks/modules/optable/targeting/v1/OptableTargetingAuctionResponseHookTest.java

@@ -359,15 +359,16 @@ public void shouldReturnUpdateActionWithId5SignatureWhenTargetingCallFailsAndNoB
                 Future.failedFuture(new RuntimeException("error")));
         moduleContext.setId5Signature(signature);
         when(invocationContext.moduleContext()).thenReturn(moduleContext);
-        when(auctionResponsePayload.bidResponse()).thenReturn(givenBidResponse());
+        final BidResponse bidlessResponse = BidResponse.builder().build();
+        when(auctionResponsePayload.bidResponse()).thenReturn(bidlessResponse);
 
         // when
         final Future<InvocationResult<AuctionResponsePayload>> future =
                 target.call(auctionResponsePayload, invocationContext);
         final InvocationResult<AuctionResponsePayload> result = future.result();
         final BidResponse bidResponse = result
                 .payloadUpdate()
-                .apply(AuctionResponsePayloadImpl.of(givenBidResponse()))
+                .apply(AuctionResponsePayloadImpl.of(bidlessResponse))
                 .bidResponse();
         final JsonNode passthrough = bidResponse.getExt().getPrebid().getPassthrough();