NAT-66-cli: add test file to parse JSON of line card and ports

test/test_parse_router.py

+from resource_management.db import model
+
+
+# Parse line card and ports from one router
+def test_parse_router(load_router):
+    fqdn = "core1.router"
+    line_card, ports = load_router
+    
+    for key, value in line_card.items():
+        print(key, value)
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