Assert that all PHYs in the config also exist in VPP

validator/__init__.py

@@ -142,3 +142,7 @@ class Validator(object):
 
         self.logger.info("Configuration validated successfully")
         return True
+
+    def get_phys(self, yaml):
+        """ Return all PHYs in the config """
+        return interface.get_phys(yaml)