rename build.{BlockDelay=>BlockDelaySecs}.

Since this global is not typed as a time.Duration,
rather as an int, it makes sense to clarify the unit.

node/modules/services.go

@@ -123,6 +123,6 @@ func RandomBeacon(p RandomBeaconParams, _ dtypes.AfterGenesisSet) (beacon.Random
 		return nil, err
 	}
 
-	//return beacon.NewMockBeacon(build.BlockDelay * time.Second)
-	return drand.NewDrandBeacon(gen.Timestamp, build.BlockDelay, p.PubSub, p.DrandConfig)
+	//return beacon.NewMockBeacon(build.BlockDelaySecs * time.Second)
+	return drand.NewDrandBeacon(gen.Timestamp, build.BlockDelaySecs, p.PubSub, p.DrandConfig)
 }

node/modules/testing/beacon.go

@@ -8,5 +8,5 @@ import (
 )
 
 func RandomBeacon() (beacon.RandomBeacon, error) {
-	return beacon.NewMockBeacon(time.Duration(build.BlockDelay) * time.Second), nil
+	return beacon.NewMockBeacon(time.Duration(build.BlockDelaySecs) * time.Second), nil
 }