Update L2switch test case

- Also change some sleep to Read Unti to speed up test case drop from 2:35 minutes to 1:01 minutes
- Change address-tracker:addresses to addresses to remove namespaces

Change-Id: Ibd0a5a6ced85a0d321166b5cfa01923879d8df44
Signed-off-by: Christopher O'Shea <christopher.o.shea@ericsson.com>
Merge "Update L2switch test case"