Inconsistencies resource loading in scheme file

[zivnevo]

Look in tests/istio_testcases/example_policies/online_boutique_multi_layer_from_live_cluster_test:
When moving sidecars.yaml resource from networkPolicyList to resourceList, this resource is not loaded.
However, when moving also rest of policy resources from networkPolicyList to resourceList (see below), the sidecars are loaded:

resourceList: onlineboutique-resources/

networkConfigList:
  - name: onlineboutique-resources
    resourceList:
      - onlineboutique-resources/
      - istio-gateways.yaml
      - network_policies.yaml
      - sidecars.yaml
    networkPolicyList:
#      - istio-gateways.yaml
#      - network_policies.yaml
#      - sidecars.yaml