added adminitstrator value to userData for admin users page

src/user.js

@@ -317,19 +317,25 @@ var utils = require('./../public/src/utils.js'),
 				return callback(err, null);
 			}
 
+			Groups.getGidFromName('Administrators', function(err, gid) {
+
 				function iterator(uid, callback) {
 					User.getUserData(uid, function(err, userData) {
+						Groups.isMember(uid, gid, function(err, isMember) {
 							if (userData) {
+								userData.administrator = isMember;
 								data.push(userData);
 							}
 							callback(null);
 						});
+					});
 				}
 
 				async.eachSeries(uids, iterator, function(err) {
 					callback(err, data);
 				});
 			});
+		});
 	}
 
 	User.createGravatarURLFromEmail = function(email) {