Improve Routing Channel error reporting when Endpoint Configuration is invalid

[jashnani]

Improve routing channel error reporting to specify which endpoint has invalid configuration. Right now when endpoint config changes or is invalid, we get an error but it's not clear which endpoint has invalid configuration. The error lists the hardware resource but if I'm using more than one endpoint from the same resource this can be tedious to debug and find.

Steps to reproduce

1. In System Explorer, autodetect a SLSC Switch module
2. Under Routing and Faulting, add a new Routing Channel
3. Add a connection (specify source and destination)
4. Change the endpoint configuration for the specified source or destination to 'Config'. (alternatively, you can change both endpoint configurations to 'Source')
5. Note glyph is updated with an error but endpoint name is not specified.