Retry Condition in Load Balancing Policy XML is Outdated

[simonkurtz-MSFT]

This condition is no longer accurate as the StatusReason has been changed by Engineering:

condition="@(context.Response.StatusCode == 429 || (context.Response.StatusCode == 503 && !context.Response.StatusReason.Contains("Backend pool") && !context.Response.StatusReason.Contains("is temporarily unavailable")))">

It should be updated to this:

condition="@(context.Response.StatusCode == 429 || context.Response.StatusCode == 503)">

A working load balancing policy can be found on APIM Samples.