Gui 1230 VPC support for Elastic IP pages

https://eucalyptus.atlassian.net/browse/GUI-1230
A better way to build the href in the link to the instance detail page here would be…

`href="${request.route_path('instance_view', id=eip.instance_id)"`

Granted, we're probably not going to change the '/instances prefix any time soon, but we should stick with the convention of building URLS via request.route_path() when possible