Add default for nodeUser/nodePass

- Add defaults incase they aren't defined in .topo file
- Minor grammer fixes

Change-Id: I26147329673ebeb8e81d2d8ce2a5f97e7b889961
diff --git a/TestON/drivers/common/cli/emulator/scapyclidriver.py b/TestON/drivers/common/cli/emulator/scapyclidriver.py
index c4708bc..1ff0d6f 100644
--- a/TestON/drivers/common/cli/emulator/scapyclidriver.py
+++ b/TestON/drivers/common/cli/emulator/scapyclidriver.py
@@ -115,7 +115,7 @@
                                 self.user_name +
                                 "@" +
                                 self.ip_address )
-                main.log.error( "Failed to connect to the Mininet Host" )
+                main.log.error( "Failed to connect to the Host" )
                 return main.FALSE
         except pexpect.EOF:
             main.log.error( self.name + ": EOF exception found" )