Un-ignore networking test

[tomaka]

substrate/client/network/src/service/tests.rs

Line 195 in d3f2044

fn notifications_state_consistent() {

Has been ignored in #6759, probably because it was failing

[stale]

Hey, is anyone still working on this? Due to the inactivity this issue has been automatically marked as stale. It will be closed if no further activity occurs. Thank you for your contributions.

[tomaka]

Issue still relevant and important.