Fixed error of inserializable json for druid test (#1213)

* Fixed error of inserializable json for druid test

* Fixed indentation

tests/druid_tests.py

@@ -102,10 +102,6 @@ def test_client(self, PyDruid):
         datasource_id = cluster.datasources[0].id
         db.session.commit()
 
-        resp = self.client.get('/caravel/explore/druid/{}/'.format(
-            datasource_id))
-        assert "[test_cluster].[test_datasource]" in resp.data.decode('utf-8')
-
         nres = [
             list(v['event'].items()) + [('timestamp', v['timestamp'])]
             for v in GB_RESULT_SET]
@@ -115,6 +111,11 @@ def test_client(self, PyDruid):
         instance.export_pandas.return_value = df
         instance.query_dict = {}
         instance.query_builder.last_query.query_dict = {}
+
+        resp = self.client.get('/caravel/explore/druid/{}/'.format(
+            datasource_id))
+        assert "[test_cluster].[test_datasource]" in resp.data.decode('utf-8')
+
         resp = self.client.get(
             '/caravel/explore/druid/{}/?viz_type=table&granularity=one+day&'
             'druid_time_origin=&since=7+days+ago&until=now&row_limit=5000&'