fix set stauts error

Author: Germey

acedatacloud_scaffold/__version__.py

@@ -1,3 +1,3 @@
-VERSION = (0, 8, 0)
+VERSION = (0, 8, 1)
 
 __version__ = '.'.join(map(str, VERSION))

acedatacloud_scaffold/handlers/base.py

@@ -12,8 +12,8 @@
 class BaseHandler(RequestHandler, LogMixin):
 
     def write_json(self, data, status=200, headers={}):
-        if not self._status_code:
-            self.set_status(status)
+        self.clear()
+        self.set_status(status)
         self.set_header('Content-Type', 'application/json')
         for key, value in headers.items():
             self.set_header(key, value)