Delete routes fails to propagate Delete to rr-clients when controller is configured as route reflector

Controller is configured as a route-reflector with two routers as router reflector clients, injected route(s) when deleted from controller is not deleted from either routers.

Steps to reproduce

1.Install Boron with bgpcep feature bundle
2.Configure role in 41-bgp-example for route-reflector
3.Inject prefix or prefixes using POSTMAN via controller (rr)
4.Delete prefix or prefixes using POSTMAN via controller (rr)
5.check that prefixes are removed from rr-client ribs.