fix_duplicate_sidecar_error

[pbajjuri20]

kiali/kiali#4387

updated according to this PR.

Applied yaml manually and verified the test case.

apiVersion: networking.istio.io/v1alpha3
kind: Sidecar
metadata:
  name: dupliacate-sidecar1-auto
  namespace: bookinfo
spec:
  egress:
    # If this config is applied, sidecars will only be able to talk to
    # other services in the same namespace, in addition to istio-telemetry
    # and istio-policy
  - hosts:
    - "./*"
    - "istio-system/istio-telemetry.istio-system.svc.cluster.local"
    - "istio-system/istio-policy.istio-system.svc.cluster.local"

[ScriptingShrimp]

nice catch!
LGTM