OFC'22 tests:

- updated descriptors

src/tests/ofc22/descriptors_emulated.json

 {
     "contexts": [
-        {
-            "context_id": {"context_uuid": {"uuid": "admin"}},
-            "topology_ids": [],
-            "service_ids": []
-        }
+        {"context_id": {"context_uuid": {"uuid": "admin"}}}
     ],
     "topologies": [
-        {
-            "topology_id": {"topology_uuid": {"uuid": "admin"}, "context_id": {"context_uuid": {"uuid": "admin"}}},
-            "device_ids": [
-                {"device_uuid": {"uuid": "R1-EMU"}},
-                {"device_uuid": {"uuid": "R2-EMU"}},
-                {"device_uuid": {"uuid": "R3-EMU"}},
-                {"device_uuid": {"uuid": "R4-EMU"}},
-                {"device_uuid": {"uuid": "O1-OLS"}}                
-            ],
-            "link_ids": [
-                {"link_uuid": {"uuid": "R1-EMU/13/0/0==O1-OLS/aade6001-f00b-5e2f-a357-6a0a9d3de870"}},
-                {"link_uuid": {"uuid": "R2-EMU/13/0/0==O1-OLS/eb287d83-f05e-53ec-ab5a-adf6bd2b5418"}},
-                {"link_uuid": {"uuid": "R3-EMU/13/0/0==O1-OLS/0ef74f99-1acc-57bd-ab9d-4b958b06c513"}},
-                {"link_uuid": {"uuid": "R4-EMU/13/0/0==O1-OLS/50296d99-58cc-5ce7-82f5-fc8ee4eec2ec"}}
-            ]
-        }
+        {"topology_id": {"topology_uuid": {"uuid": "admin"}, "context_id": {"context_uuid": {"uuid": "admin"}}}}
     ],
     "devices": [
         {