move shutdown to close()

Signed-off-by: Cassandra Coyle <cassie@diagrid.io>

Author: cicoyle

client/src/main/java/com/microsoft/durabletask/DurableTaskGrpcWorker.java

@@ -87,6 +87,7 @@ public void start() {
      * configured.
      */
     public void close() {
+        this.isNormalShutdown = true;
         this.shutDownWorkerPool();
         this.closeSideCarChannel();
     }
@@ -219,7 +220,6 @@ public void startAndBlock() {
      * Stops the current worker's listen loop, preventing any new orchestrator or activity events from being processed.
      */
     public void stop() {
-        this.isNormalShutdown = true;
         this.close();
     }