fix scala 2.13 compilation

Brendan Doyle · Brendan Doyle · commit a2d1f5b8e538 · 2022-09-12T16:29:59.000-07:00
diff --git a/tests/src/test/scala/org/apache/openwhisk/common/etcd/EtcdWorkerTests.scala b/tests/src/test/scala/org/apache/openwhisk/common/etcd/EtcdWorkerTests.scala
@@ -159,7 +159,7 @@ class EtcdWorkerTests
     (mockEtcd
       .del(_: String))
       .expects(key)
-      .onCall(_ => {
+      .onCall((_: String) => {
         if (firstAttempt) {
           firstAttempt = false
           Future.failed(new StatusRuntimeException(Status.RESOURCE_EXHAUSTED))
