Merge branch 'add_mysql_client' into 'master'

假设数据库连接异常，强制退出程序，supervisor重启linub

See merge request !443

linucb/views/collect_data.py

@@ -315,10 +315,10 @@ class CollectData(object):
                         except:
                             logging_exception()
                             logging.error("catch exception,err_msg:%s" % traceback.format_exc())
+                            # 假设数据库连接异常，强制退出程序，supervisor重启linub
+                            os._exit(0)
 
             return True
         except:
             logging_exception()
             logging.error("catch exception,err_msg:%s" % traceback.format_exc())
-            # 假设数据库连接异常，强制退出程序，supervisor重启linub
-            os._exit(0)