new test: load balancing

[Geal]

• set up an application with two backends, each with different weights
• each backend is set up to indicate its id (number or something else) in the response
• the client does a serie of requests (no keep-alive, otherwise the session would just reuse the backend connection)
• the client counts how many requests were answered by which backend
• we check that it corresponds to the weights

[NotBad4U]

the client counts how many requests were answered by which backend

Why we have to do that ?

NOTE: The description doesn't specify which load balancing strategy we'll use

[Geal]

We do that to verify that the load balancer affects requests to backends according to the weights specified in the configuration. At this scale it should get the same result with both LB strategies