Exclude jobExtraConfigurations from jobs config API (#105)

diff --git a/shardingsphere-elasticjob-lite-ui/shardingsphere-elasticjob-lite-ui-backend/src/main/java/org/apache/shardingsphere/elasticjob/lite/ui/web/controller/JobConfigController.java b/shardingsphere-elasticjob-lite-ui/shardingsphere-elasticjob-lite-ui-backend/src/main/java/org/apache/shardingsphere/elasticjob/lite/ui/web/controller/JobConfigController.java
index 5f28f52..7e2954a 100644
--- a/shardingsphere-elasticjob-lite-ui/shardingsphere-elasticjob-lite-ui-backend/src/main/java/org/apache/shardingsphere/elasticjob/lite/ui/web/controller/JobConfigController.java
+++ b/shardingsphere-elasticjob-lite-ui/shardingsphere-elasticjob-lite-ui-backend/src/main/java/org/apache/shardingsphere/elasticjob/lite/ui/web/controller/JobConfigController.java
@@ -53,6 +53,7 @@
     @GetMapping(value = "/{jobName:.+}")
     public ResponseResult<JobConfigurationPOJO> getJobConfig(@PathVariable("jobName") final String jobName) {
         JobConfigurationPOJO data = jobAPIService.getJobConfigurationAPI().getJobConfiguration(jobName);
+        data.setJobExtraConfigurations(null);
         return ResponseResultUtil.build(data);
     }
     
@@ -63,6 +64,7 @@
      */
     @PutMapping
     public ResponseResult<Boolean> updateJobConfig(@RequestBody final JobConfigurationPOJO jobConfiguration) {
+        jobConfiguration.setJobExtraConfigurations(jobAPIService.getJobConfigurationAPI().getJobConfiguration(jobConfiguration.getJobName()).getJobExtraConfigurations());
         jobAPIService.getJobConfigurationAPI().updateJobConfiguration(jobConfiguration);
         return ResponseResultUtil.build(Boolean.TRUE);
     }