Support interactions of frontend/backend microservices -> client

[salehsedghpour]

E.g., to simulate responses,
Make sure performance monitoring metrics are calculated from the client perspective

[alekodu]

We have discussed that:

• Response simulation is limited to synchronous way since asynchronous responses will require a callback.
• Microservice-client interactions will require hosting some sort of http server in the client side.

This issue is then narrowed down to:

• Containerisation of Tsung
• K8s template for Tsung image deployment