Update log format

[LorcanMcVeigh]

Proposed changes

update log format from
2020/04/10 21:13:43 Updated HTTP servers of {backend2 80 asg-sync-4-WebserverGroup2-B07B6PPXO49Y http 0xc0000a50e0 0xc0000a50e8 10s 0s}; Added: [{ID:0 Server:172.31.26.57:80 MaxConns:0xc0000a50e0 MaxFails:0xc0000a50e8 FailTimeout:10s SlowStart:0s Route: Backup:<nil> Down:<nil> Drain:false Weight:<nil> Service:}], Removed: [], Updated: []
To new format
2020/04/10 21:13:43 Updated HTTP servers of backend2 for group asg-sync-4-WebserverGroup2-B07B6PPXO49Y: Added: [172.31.26.57:80,172.31.26.61:80], Removed: [], Updated: []

Checklist

Before creating a PR, run through this checklist and mark each as complete.

• I have read the CONTRIBUTING doc
• I have added tests that prove my fix is effective or that my feature works
• I have checked that all unit tests pass after adding my changes
• I have updated necessary documentation
• I have rebased my branch onto master
• I will ensure my PR is targeting the master branch and pulling from my branch from my own fork

[Dean-Coakley]

Thanks for including a sample output in the PR description. - That's helpful!