setUpClass/tearDownClass full chain

Ensure the setUpClass/tearDownClass methods calls the super properly.
The setUpClass call tested at setUp time, the tearDownClass at exit
time.

super calling issues are also fixed.

Implements blueprint stop-leaking
Closes-Bug: #1212071

Change-Id: I266efe0cd363b330b1511e7e983dab9f62778848
Merge "setUpClass/tearDownClass full chain"