Add a new function into Common to compare two XML files
3 new test case to check the flow are pushed to the switch correctly
Putting back the Variables i deleted last change.

Change-Id: I968ed7050a48595dfcd8a1b7bacee21dc39ebf61
Signed-off-by: Christopher O'Shea <christopher.o.shea@ericsson.com>
Merge "Add a new function into Common to compare two XML files 3 new test case to check the flow are pushed to the switch correctly Putting back the Variables i deleted last change."