Add assertion to PortForwardServiceTest.simpleScenario

[manusa]

Description

After #2752 / #2868 we've seen that the simpleScenario test case is missing some sort of assertion to ensure that the port forwarding service is working.

The test should perform an assertion.

[Troy-Butler]

Hi, could you please assign this issue to me?

[manusa]

Could you please provide some details about the assertion you're going to add?

[Troy-Butler]

I'm very sorry but I'm going to have to unassign myself from this issue.

[clarenced]

Do you still need help on this issue ?