Initial implementation of ONOS cluster driver

- Create CLI, REST, and "Bench" components for a cluster
- Return driver object when it is created
- Add __str__ and __repr__ implementations for drivers
- Add first pass at a cluster class
- Prototype with clustered Sample test
- Prototype with HAsanity test
- Add new Exception class for SkipCase

Change-Id: I32ee7cf655ab9a2a5cfccf5f891ca71a6a70c1ee
diff --git a/TestON/drivers/common/clidriver.py b/TestON/drivers/common/clidriver.py
index 4938369..2dc1274 100644
--- a/TestON/drivers/common/clidriver.py
+++ b/TestON/drivers/common/clidriver.py
@@ -33,6 +33,7 @@
     """
     def __init__( self ):
         super( CLI, self ).__init__()
+
     def checkPrompt(self):
         for key in self.options:
             if key == "prompt" and self.options['prompt'] is not None: