[ONOS-6619] Allow different bash prompts in TestON components, Also including part of ONOS-6595

Change-Id: I31c923347dd8fac018aaf47868394552a2deefbc
diff --git a/TestON/drivers/component.py b/TestON/drivers/component.py
index fc17d47..6021071 100644
--- a/TestON/drivers/component.py
+++ b/TestON/drivers/component.py
@@ -32,6 +32,7 @@
         self.default = ''
         self.wrapped = sys.modules[ __name__ ]
         self.count = 0
+        self.prompt = "\$"
 
     def __getattr__( self, name ):
         """