eds: Hold lock for iterating on EDS clusters for logging (#5373)
eds: Hold lock for iterating on EDS clusters for logging (#5373)

Fixes: https://github.com/istio/istio/issues/4903
Signed-off-by: Romain Lenglet <b8aabb4b95c817d9df69b6be95b2b94d6b1efe17@covalent.io>
geeknoid/istio,smawson/istio,istio/istio,smawson/istio,smawson/istio,frankbu/istio,istio/istio,frankbu/istio,frankbu/istio,smawson/istio,geeknoid/istio,geeknoid/istio,geeknoid/istio,frankbu/istio,smawson/istio,istio/istio,geeknoid/istio,frankbu/istio,frankbu/istio,istio/istio,istio/istio,smawson/istio,geeknoid/istio