config: unify BasicService config within existing services

There are no changes visible from the user side (at least for those
users who doesn't put Prometheus's or pprof's port in quotes), just
internal refactoring. From now and on, BasicService configuration is
used by RPC server config, TLS for RPC server, pprof and Prometheus.

cli/server/server_test.go

@@ -330,7 +330,9 @@ func TestConfigureAddresses(t *testing.T) {
 		cfg := &config.ApplicationConfiguration{
 			Address: defaultAddress,
 			RPC: config.RPC{
-				Address: customAddress,
+				BasicService: config.BasicService{
+					Address: customAddress,
+				},
 			},
 		}
 		configureAddresses(cfg)