Really fix the test helper memory leak this time

ft/ft-test-helpers.cc

@@ -133,6 +133,9 @@ int toku_testsetup_leaf(FT_HANDLE ft_handle, BLOCKNUM *blocknum, int n_children,
         toku_memdup_dbt(&pivotkeys[i], keys[i], keylens[i]);
     }
     node->pivotkeys.create_from_dbts(pivotkeys, n_children - 1);
+    for (int i = 0; i + 1 < n_children; i++) {
+        toku_destroy_dbt(&pivotkeys[i]);
+    }
     toku_free(pivotkeys);
 
     *blocknum = node->blocknum;
@@ -154,6 +157,11 @@ int toku_testsetup_nonleaf (FT_HANDLE ft_handle, int height, BLOCKNUM *blocknum,
         toku_memdup_dbt(&pivotkeys[i], keys[i], keylens[i]);
     }
     node->pivotkeys.create_from_dbts(pivotkeys, n_children - 1);
+    for (int i = 0; i + 1 < n_children; i++) {
+        toku_destroy_dbt(&pivotkeys[i]);
+    }
+    toku_free(pivotkeys);
+
     *blocknum = node->blocknum;
     toku_unpin_ftnode(ft_handle->ft, node);
     return 0;