Removed State Change code in the Status Hub sample
Increased KeepAlive timeout threshold to be 3 keep alives

- This will also raise the timeout warn threshold
- I was unable to see scenarios when keep alive warn was being triggered
inaccurately but raising this threshold will ensure correctness

#1211
Minified/compiled keep alive threshold increases

- Note, #1211 is unable to be JS unit tested at this time due to not
having control over the server keep alive configuration via the client.
- Reviewed by @shalter