InCNTRE/oftest — pull request #93 by ytch (2014-09-30 08:01:34+00:00)
Title: reinitialize controller object

Hello,

In the fix of Issue #78 ,

This code
```
#Shutdown the controller
self.controller.shutdown()
```
will stop the run() loop of controller.py, and the controller thread is stopped.
Therefore the next line
```
self.controller.connect()
```
won't work and switch cannot connect to controller again.