[Stateless SG] Add negative API tests for Stateless SG

This patch adds negative API tests which checks that:
- port can't be created with both stateless and stateful SG,
- SG with different type than already used can't be added to the port,
- toggle 'stateful' attribute of SG when it's used by port,

Change-Id: I70089725f590c346e976bc579dd78d6cf374f0c3
1 file changed