fix: fix syntax

lib/jobs.js

@@ -46,8 +46,7 @@ const retryOptions = {
  */
 function start(buildConfig, callback) {
     return redis.hget(`${queuePrefix}buildConfigs`, buildConfig.buildId)
-        .then(JSON.parse)
-        .then(executor.start)
+        .then(fullBuildConfig => executor.start(JSON.parse(fullBuildConfig)))
         .then(result => callback(null, result), (err) => {
             winston.error('err in start job: ', err);
             callback(err);