fix test_scheduler

Former-commit-id: 00128464b581a9b4fe56c8653e7623801a684330

CHANGELOG.md

@@ -53,6 +53,7 @@ Please mark all change in change log and use the ticket from JIRA.
 - MS-626 - Refactor DataObj to support cache any type data
 - MS-648 - Improve unittest
 - MS-655 - Upgrade SPTAG
+- \#42 - Put union of index_build_device and search resources to gpu_pool
 
 ## New Feature
 - MS-614 - Preload table at startup