add endpoint mode in service pretty

Signed-off-by: allencloud <allen.sun@daocloud.io>

docs/reference/commandline/service_inspect.md

@@ -115,7 +115,7 @@ ID:		c8wgl7q4ndfd52ni6qftkvnnp
 Name:		frontend
 Labels:
  - org.example.projectname=demo-app
-Mode:		REPLICATED
+Service Mode:	REPLICATED
  Replicas:		5
 Placement:
 UpdateConfig:
@@ -123,6 +123,7 @@ UpdateConfig:
 ContainerSpec:
  Image:		nginx:alpine
 Resources:
+Endpoint Mode:  vip
 Ports:
  Name =
  Protocol = tcp