New CI image (#6223)

* fix (ci): hotfix Docker release

* change (ci): moving to the tested CI image with a proper name

* change (ci): rename substrate-ci-linux

* Reduce the lots_of_incoming_peers_works test load (#6314)

* change (ci): moving to the tested CI image with a proper name

* change (ci): rename substrate-ci-linux

* Reduce the lots_of_incoming_peers_works test load (#6314)

Co-authored-by: Bastian Köcher <git@kchr.de>
Co-authored-by: Pierre Krieger <pierre.krieger1708@gmail.com>

substrate/.gitlab-ci.yml

@@ -58,7 +58,7 @@ default:
     name: parity-build
 
 .docker-env:                       &docker-env
-  image:                           parity/rust-builder:latest
+  image:                           paritytech/ci-linux:production
   before_script:
     - rustup show
     - cargo --version

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

@@ -291,7 +291,7 @@ fn lots_of_incoming_peers_works() {
 	// this test ends.
 	let mut background_tasks_to_wait = Vec::new();
 
-	for _ in 0..256 {
+	for _ in 0..32 {
 		let main_node_peer_id = main_node_peer_id.clone();
 
 		let (_dialing_node, event_stream) = build_test_full_node(config::NetworkConfiguration {