rados_list_parallel.cc: cleanup before return from run()

Fix for another case of:

CID 717112 (#1 of 1): Resource leak (RESOURCE_LEAK)
 leaked_storage: Variable io_ctx going out of scope leaks
 the storage it points to.

Signed-off-by: Danny Al-Gaaf <danny.al-gaaf@bisect.de>

Author: dalgaaf

src/test/system/rados_list_parallel.cc

@@ -58,6 +58,7 @@ class RadosDeleteObjectsR : public SysTestRunnable
 
   int run(void)
   {
+    int ret_val = 0;
     rados_t cl;
     RETURN1_IF_NONZERO(rados_create(&cl, NULL));
     rados_conf_parse_argv(cl, m_argc, m_argv);
@@ -90,15 +91,17 @@ class RadosDeleteObjectsR : public SysTestRunnable
       for (int i = 0; i < r; ++i)
 	++d;
       if (d == to_delete.end()) {
-	return -EDOM;
+	ret_val = -EDOM;
+	goto out;
       }
       std::string oid(d->second);
       to_delete.erase(d);
       int ret = rados_remove(io_ctx, oid.c_str());
       if (ret != 0) {
 	printf("%s: rados_remove(%s) failed with error %d\n",
 	       get_id_str(), oid.c_str(), ret);
-	return ret;
+	ret_val = ret;
+	goto out;
       }
       ++removed;
       if ((removed % 25) == 0) {
@@ -112,10 +115,11 @@ class RadosDeleteObjectsR : public SysTestRunnable
 
     printf("%s: removed %d objects\n", get_id_str(), removed);
 
+out:
     rados_ioctx_destroy(io_ctx);
     rados_shutdown(cl);
 
-    return 0;
+    return ret_val;
   }
 private:
   std::string m_pool_name;