Openstack client ip automatic setup when instance launch

[egonzale]

Currently when OpenstackDriver instances are launched the ports that are opened are not set automatically in any case. This means:

1. if the option "Allow user to request instance firewall to allow access to user's IP address" is not checked, the instance is not accessible by the user (since by default no ports are open)
2. if the option "Allow user to request instance firewall to allow access to user's IP address" is checked, then the user has to always go to the instance details (once started) and manually query and set the client's IP.

Preferred behaviour:
In either situation, the instance's ports are automatically opened for the client's IP where Pebbles is running.
That way the instance is always accessible via the ports indicated in the blueprint.