Bugfix/issue 416

[glasswalk3r]

Also included other bug fixes and improvements. Tests are also more restrictive now:

• one must declare the port number of a exception will be raised;
• one must declare the protocol unless "-1" is acceptable;
• one must declare the CIDR (target or for) unless 0.0.0.0/0 is acceptable;

[glasswalk3r]

and I would like to avoid erasing test cases to show it as much as possible.

Those deleted test cases are just wrong: they were assuming an output from a different security group name. It's like testing security group B, but using output from the request of security group A details.