Remove network lock (#840)

* Initial work on removing libp2p lock

* Removes lock from libp2p service

* Completed network lock removal

* Correct network termination future

* Correct fmt issues

* Remove Drop implementation for network service

* Address reviewers suggestions

* Fix dht persistence test (#844)

* Fix persistence test

* Block until dht is persisted

* Fix libp2p test

* Correct test ordering check

* Remove expensive tests from debug testing

Co-authored-by: Pawan Dhananjay <pawandhananjay@gmail.com>

beacon_node/eth2-libp2p/tests/common/mod.rs

@@ -43,7 +43,7 @@ pub fn build_libp2p_instance(
 ) -> LibP2PService {
     let config = build_config(port, boot_nodes, secret_key);
     // launch libp2p service
-    LibP2PService::new(config, log.clone()).unwrap()
+    LibP2PService::new(&config, log.clone()).unwrap().1
 }
 
 #[allow(dead_code)]