Wrong handling of the global resourceList in combination with livesim

[zivnevo]

• When both the global resourceList and the livesim missing resource contain the same resource kind (e.g., pods), the resources from the global resourceList are ignored.
  See example tests/istio_testcases/example_policies/sidecar_examples_w_onlineboutique/sidecars-and-gateways-test-scheme.yaml:
  when the resource ../online_boutique/new_online_boutique_manifests_istio/all_deployments.yaml appears only in global resourceList (remove it from the network config resourceList), then on the livesim run this resource is ignored, resulting in all the pods missing.

• When none of global resourceList/podList/namespaceList exist, there is a (time consuming) attempt to load resources from live cluster, even if there is local resourceList/podList/namespaceList in a network config.
  Example - comment out the global resourceList in the test above.