Fix sidecars not retrieving updated mesh networks configuration (#11222)
Fix sidecars not retrieving updated mesh networks configuration (#11222)

* Fix sidecars not retrieving updated mesh networks configuration

* Review comments addressed

* Also verify not nil in initMesh

* Review comments addressed

smawson/istio,istio/istio,geeknoid/istio,istio/istio,istio/istio,smawson/istio,istio/istio,geeknoid/istio,smawson/istio,geeknoid/istio,istio/istio,geeknoid/istio,smawson/istio,geeknoid/istio,smawson/istio,smawson/istio,geeknoid/istio