Add lsof for integration-test-base

[ArtiomDivak]

lsof needed to check if port connected inside
controller/agent container.

[mwperina]

LGTM

[engelmi]

Why exactly is this necessary? Shouldn't it be sufficient/better to use the current tooling like bluechictl to check if the agent is connected?

Note: This also requires rebuilding the image and pushing to quay.io.

[engelmi]

Follow up of #696 (review):
This is how it was done previously:
https://github.com/eclipse-bluechi/bluechi/blob/main/tests/tests/tier0/monitor-node-reconnect/python/is_node_connected.py

[mwperina]

Follow up of #696 (review): This is how it was done previously: https://github.com/eclipse-bluechi/bluechi/blob/main/tests/tests/tier0/monitor-node-reconnect/python/is_node_connected.py

We should check that a different port passed though command line option has been accepted by controller and the controller started to listen on a different port

[engelmi]

We should check that a different port passed though command line option has been accepted by controller and the controller started to listen on a different port

And changing the port for both, controller and agent, observing the disconnect and (after changing the agent) the reconnect of the agent is "too high level", I guess, since we are not really verify the new port.
Makes sense, I think. Was just trying to understand this change.

yes

[mwperina]

We should check that a different port passed though command line option has been accepted by controller and the controller started to listen on a different port

And changing the port for both, controller and agent, observing the disconnect and (after changing the agent) the reconnect of the agent is "too high level", I guess, since we are not really verify the new port. Makes sense, I think. Was just trying to understand this change.

My test thoughts: #680 (comment)
So for checking controller actually accepted new port configuration we need a tool like lsof

[engelmi]

LGTM