Downgrade default number of instances
Downgrade default number of instances

Part of the "heavy traffic" is now absorbed by our CDN provider, since
many requests were targeting Sagan's ATOM endpoint constantly.

Thourough tests using New Relic show that we can safely downgrade to 3
instances by default.

vizewang/sagan,vizewang/sagan,TabberGit/sagan,mbateman/sagan,garylgh/sagan,dsyer/sagan,amit-siddhu/sagan,garylgh/sagan,yhj630520/sagan,TabberGit/sagan,lowtalker/sagan,dvaughn555/sagan,seoilhyun/sagan,andriykonoz/sagan,spring-io/sagan,eonezhang/sagan,andriykonoz/sagan,dharmaraju/sagan,martinlippert/sagan,dkushner/sagan,martinlippert/sagan,garylgh/sagan,garylgh/sagan,mbateman/sagan,spring-io/sagan,rwinch/sagan,yhj630520/sagan,TabberGit/sagan,lowtalker/sagan,eonezhang/sagan,andriykonoz/sagan,amit-siddhu/sagan,lowtalker/sagan,martinlippert/sagan,TabberGit/sagan,BHASKARSDEN277GITHUB/sagan,dkushner/sagan,dharmaraju/sagan,dsyer/sagan,mbateman/sagan,dharmaraju/sagan,dlizarra/sagan,dvaughn555/sagan,andriykonoz/sagan,rwinch/sagan,eonezhang/sagan,seoilhyun/sagan,gregturn/sagan,amit-siddhu/sagan,BHASKARSDEN277GITHUB/sagan,spring-io/sagan,dkushner/sagan,dharmaraju/sagan,lowtalker/sagan,dlizarra/sagan,rwinch/sagan,gregturn/sagan,dsyer/sagan,dlizarra/sagan,dkushner/sagan,yhj630520/sagan,eonezhang/sagan,BHASKARSDEN277GITHUB/sagan,amit-siddhu/sagan,seoilhyun/sagan,vizewang/sagan,mbateman/sagan,dlizarra/sagan,dvaughn555/sagan,gregturn/sagan,dvaughn555/sagan,seoilhyun/sagan,spring-io/sagan,martinlippert/sagan,dsyer/sagan,yhj630520/sagan,BHASKARSDEN277GITHUB/sagan,vizewang/sagan,rwinch/sagan