Get rid of wildcard imports (#1916)

* Get rid of wildcard imports

* Update core/service/src/lib.rs

Co-Authored-By: cmichi <mich@elmueller.net>

* Update core/client/src/client.rs

Co-Authored-By: cmichi <mich@elmueller.net>

* Import by namespace

substrate/core/cli/src/lib.rs

@@ -59,7 +59,7 @@ use log::info;
 use lazy_static::lazy_static;
 
 use futures::Future;
-use substrate_telemetry::TelemetryEndpoints;
+use substrate_telemetry::{telemetry, TelemetryEndpoints};
 
 const MAX_NODE_NAME_LENGTH: usize = 32;