Configuration Issues

[Mike-E-angelo]

Describe the bug

In regards to https://github.com/Azure/azure-signalr/issues/1650

There appear to be two issues:

• Azure:SignalR:ApplicationName needs to be Azure:SignalR:ApplicationName: at the moment
• Azure:SignalR:ConnectionCount is not supported

Ideally, all properties are configurable via configuration. This is almost essential for multi-environment deployments.

Thank you for any consideration and all your efforts out there.

[vicancy]

Nice catch, also we should consider replacing ConnectionCount with InitialConnectionCount + MaxConnectionCount. cc @vwxyzh