Solved problem in AWS when listing networks (it was conflicting with code for...

Solved problem in AWS when listing networks (it was conflicting with code for sdn-assist). Modified the info the connector reports about the instance, now, if possible, the public IP is reported instead of the private one

Change-Id: I0c46c5d62ad0777615e7ba234d2a912d9353dc1b
Signed-off-by: montesmoreno <pablo.montesmoreno@telefonica.com>