Modifying stats manager tests for collection of flow details

Removing test cases which can be applicable only on cpqd switch
Adding update tests for sal operations

Change-Id: If07d844a8aa1474c24718fc0ff27a05c02ade300
Signed-off-by: Peter Gubka <pgubka@cisco.com>
(cherry picked from commit 2aa658380f4d41f3c51bd63ea1afb6953e3d080e)

Change-Id: I1b766472448069f5656ccc21595db9c352d9e533
Signed-off-by: Luis Gomez <ecelgp@gmail.com>