refactor: bubble up error handling so that standard exit codes can be set at the top-level

LogFail shouldn't be called internally if at all possible.

plugins/resource/src/subcommands/subcommands.go

@@ -88,7 +88,7 @@ func main() {
 		appName := args.Arg(0)
 		err = resource.CommandReserveClear(appName, *processType)
 	default:
-		common.LogFail(fmt.Sprintf("Invalid plugin subcommand call: %s", subcommand))
+		err = fmt.Errorf("Invalid plugin subcommand call: %s", subcommand)
 	}
 
 	if err != nil {

plugins/resource/src/triggers/triggers.go

@@ -45,7 +45,7 @@ func main() {
 		key := flag.Arg(3)
 		err = resource.TriggerResourceGetProperty(appName, processType, resourceType, key)
 	default:
-		common.LogFail(fmt.Sprintf("Invalid plugin trigger call: %s", trigger))
+		err = fmt.Errorf("Invalid plugin trigger call: %s", trigger)
 	}
 
 	if err != nil {