Fix Invocation count wrong for multiple namespace

Fixes https://github.com/openfaas/faas/issues/1413
Fixes https://github.com/openfaas/faas-netes/issues/707

This fixes the Gateway UI not updating the
invocation count automatically without a page reload.

Tested by deploying on a local cluster and making sure invocations go up
with and without namespace suffix

Signed-off-by: Alistair Hey <alistair@heyal.co.uk>

gateway/assets/script/bootstrap.js

@@ -222,6 +222,16 @@ app.controller("home", ['$scope', '$log', '$http', '$location', '$interval', '$f
                       $scope.selectedFunction = undefined;
                   }
                 }
+
+                if ($scope.selectedFunction) {
+                    response.data.some(function(entry) {
+                        if (entry.name === $scope.selectedFunction.name) {
+                            $scope.selectedFunction.invocationCount = entry.invocationCount
+                            return true
+                        }
+                    });
+                }
+
             });
         };