Yanqin Jin c360675750 Add secondary instance to stress test (#5479)
Summary:
This PR allows users to run stress tests on secondary instance.

Test plan (on devserver)
```
./db_stress -ops_per_thread=100000 -enable_secondary=true -threads=32 -secondary_catch_up_one_in=10000 -clear_column_family_one_in=1000 -reopen=100
```
Pull Request resolved: https://github.com/facebook/rocksdb/pull/5479

Differential Revision: D16074325

Pulled By: riversand963

fbshipit-source-id: c0ed959e7b6c7cda3efd0b3070ab379de3b29f1c
2019-07-01 11:49:50 -07:00
..
2017-07-15 16:11:23 -07:00
2017-08-03 15:56:46 -07:00
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