Merge pull request #8877 from dgquintas/bm_fullstack_dtor

Shutdown grpc for fullstack benchmark
diff --git a/test/cpp/microbenchmarks/bm_fullstack.cc b/test/cpp/microbenchmarks/bm_fullstack.cc
index 2b6dd32..bc6038d 100644
--- a/test/cpp/microbenchmarks/bm_fullstack.cc
+++ b/test/cpp/microbenchmarks/bm_fullstack.cc
@@ -71,6 +71,10 @@
     rq_ = grpc_resource_quota_create("bm");
   }
 
+  ~InitializeStuff() {
+    init_lib_.shutdown();
+  }
+
   grpc_resource_quota* rq() { return rq_; }
 
  private: