fix(cmd/cfg): Use Babe Lead value from toml config (ChainSafe#2032)

Earlier, babe lead value was read only from "babe-lead" cli flag.
cfg.BABELead was being set to false in case this flag was not provided.

This commit sets cfg.BABELead from toml config and uses "babe-lead" cli
flag only when it is set.

cmd/gossamer/config.go

@@ -568,7 +568,11 @@ func setDotCoreConfig(ctx *cli.Context, tomlCfg ctoml.CoreConfig, cfg *dot.CoreC
 	cfg.BabeAuthority = tomlCfg.Roles == types.AuthorityRole
 	cfg.GrandpaAuthority = tomlCfg.Roles == types.AuthorityRole
 	cfg.GrandpaInterval = time.Second * time.Duration(tomlCfg.GrandpaInterval)
-	cfg.BABELead = ctx.GlobalBool(BABELeadFlag.Name)
+
+	cfg.BABELead = tomlCfg.BABELead
+	if ctx.IsSet(BABELeadFlag.Name) {
+		cfg.BABELead = ctx.GlobalBool(BABELeadFlag.Name)
+	}
 
 	// check --roles flag and update node configuration
 	if roles := ctx.GlobalString(RolesFlag.Name); roles != "" {

dot/config.go

@@ -333,6 +333,7 @@ func DevConfig() *Config {
 			BabeAuthority:    dev.DefaultBabeAuthority,
 			GrandpaAuthority: dev.DefaultGrandpaAuthority,
 			WasmInterpreter:  dev.DefaultWasmInterpreter,
+			BABELead:         dev.DefaultBabeAuthority,
 		},
 		Network: NetworkConfig{
 			Port:        dev.DefaultNetworkPort,