fix the orphaned channel due to the telemetry test (#999)

Signed-off-by: Cassandra Coyle <cassie@diagrid.io>
Co-authored-by: Artur Souza <artursouza.ms@outlook.com>
Co-authored-by: Dapr Bot <56698301+dapr-bot@users.noreply.github.com>

Author: 3 people

sdk/src/test/java/io/dapr/client/DaprClientGrpcTelemetryTest.java

@@ -191,6 +191,14 @@ public <ReqT, RespT> ServerCall.Listener<ReqT> interceptCall(ServerCall<ReqT, Re
       new GrpcChannelFacade(channel, daprHTTP), asyncStub, new DefaultObjectSerializer(), new DefaultObjectSerializer());
   }
 
+
+  @AfterEach
+  public void tearDown() throws Exception {
+    if (client != null) {
+      client.close();
+    }
+  }
+
   @ParameterizedTest
   @MethodSource("data")
   public void invokeServiceVoidWithTracingTest(String traceparent, String tracestate, boolean expectGrpcTraceBin) throws IOException {