Fixes bug with duplicated index name

Closes-bug: #1308538
Change-Id: Ie5b4019ab0c2a1f95b75d33861c08730073c7fc2
Merge "Fixes bug with duplicated index name"
Add rate limiting per tenant

Add rate limiting per tenant per single node,
or per gunicorn worker in gunicorn enabled configuration

Implements blueprint: rate-limit-per-tenant

Change-Id: Ib8b39e94a74977f9b8174be686d4810c05ad7e0a