ningyougang opened a new pull request #2978: Fix bug when remove invoker
URL: https://github.com/apache/incubator-openwhisk/pull/2978
 
 
   If deploy mutilple invoker instances on one physical node, and  execute 
below `remove remaining actions`, exist problems
   ```
   TASK [invoker : remove remaining actions] 
**************************************
   Wednesday 15 November 2017  14:58:47 +0900 (0:00:00.618)       0:00:08.693 
**** 
   changed: [invoker0]
   
   TASK [invoker : remove invoker log directory] 
**********************************
   Wednesday 15 November 2017  15:08:45 +0900 (0:09:57.545)       0:10:06.239 
**** 
   changed: [invoker0]
   ```
   1. it will costs much time to execute(above cost 10 mins), becuase when 
remove `invoker0`, the task will remove action container `wsk0_, wsk1_, and so 
on`, on the other hand, `wsk1` is removed by `invoker1's stop hook` default, so 
that's the reason why it will cost much time.
   2. it may remove other invoker's action container, this is wrong logic, righ 
logic is `inovker0 remove wsk0_xx`, `invoker1 remove wsk1_xx`, and so on.
   
   So it is necessary to add `exact filter` to `wsk action container` when 
remove invoker. 

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