Remove or reduce level of 'Either all or no Ingress should have the priority specified' error message

[lewis-jackson-bots]

Is your feature request related to a problem? Please describe.

We're seeing this error message in our logs:

application-gateway-kubernetes-ingress/pkg/appgw/requestroutingrules.go

Line 500 in dd55e83

klog.Error("Either all or no Ingress should have the priority specified.")

But as far as I can tell, this error is ignorable as the code is perfectly capable of handling the assignment of nil priorities to sequential numbers while leaving set priorities alone.

Describe the solution you'd like
This could be a warning or info level log event.