Create routes prior to attempting to map them
Create routes prior to attempting to map them

This change appears to resolve the problem with 502s during blue/green
deploys.

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