Add a test for removing security group from ACTIVE instance

Test name: "test_remove_sec_grp_from_active_vm"
1) Create SG associated with ICMP rule
2) Create Port (assoiated to SG #1) and use it to create the VM
3) Ping the VM, expected should be PASS
4) Remove the security group from VM by Port update
5) Ping the VM, expected should be FAIL

Change-Id: I9fbcdd0f30beeb6985bab4de4d53af639f408c75
1 file changed