Fix SPARK_MASTER_IP variable in json description

gen_json.py

@@ -230,7 +230,7 @@ def spark_submit_service(mem_limit, worker_mem_limit, hdfs_namenode, command):
         },
         'ports': [],
         'environment': [
-            ["SPARK_MASTER", "spark://{dns_name#spark-master0}:7077"],
+            ["SPARK_MASTER_IP", "{dns_name#spark-master0}"],
             ["SPARK_EXECUTOR_RAM", str(executor_ram)],
             ["SPARK_DRIVER_RAM", str(driver_ram)],
             ["HADOOP_USER_NAME", "{user_name}"],