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Issue description: 

ad0007l-3.1 + Lab: Observing OpenShift Service Mesh
2. Integrate the namespaces in the OpenShift metrics with pod monitors, and open external traffic for the travel-control namespace with a virtual service and a gateway.

For this, it would be nice to specify the name of the gateway and virtualservice here, along with additional specifications (such as port), in order to give students a chance to set it up from scratch, rather than relying on a preconfigured yaml file. Similar to the comprehensive review lab 

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Expected result: