Merge branch 'branch-0.3.0' of http://192.168.1.105:6060/xuan.yang/vecwise_engine into branch-0.3.0

Former-commit-id: 4083c2e626b27c1995f7394bbbf978910cb045b9

python/sdk/examples/example.py

@@ -11,7 +11,7 @@ def main():
 
     # Connect
     # Please change HOST and PORT to correct one
-    param = {'host': '192.168.1.121', 'port': '33001'}
+    param = {'host': 'HOST', 'port': 'PORT'}
     cnn_status = milvus.connect(**param)
     print('# Connect Status: {}'.format(cnn_status))