GUI-1328 & GUI-1327 Added Keypair to the filter list and adjusted search bar to filter by security group on instance landing page

https://eucalyptus.atlassian.net/browse/GUI-1328
https://eucalyptus.atlassian.net/browse/GUI-1327
@kyolee310: No need for the hasOwnProperty check here, per https://docs.angularjs.org/api/ng/function/angular.forEach …

`It is worth noting that .forEach does not iterate over inherited properties because it filters using the hasOwnProperty method.`