performance testing for heart beat

[HarrisChu]

if metadLastUpdateTime_ > localDataLastUpdateTime_, it would request these information from meta:

• user and roles
• index
• session
• space
• parts
• schemas

and then update local cache.

should test the performance for:

1. 500 spaces, each with 10 schemas, 100 parts
2. 10,000 sessions

and then verify the elapsed time.