Test 0006: add json to GET /session and update expected return code.
Test 0012: add json to GET /software and update expected return code (200),
in this case json fields are integer, not string.
Test 0020: remove it, /image/create/incremental does not exist anymore.
Test 0021: same as before for /image/restore/basic
Test 0022: same as before for /image/restore/incremental
Test 0023: rename to test_0020.
Diego Crespo Quinta