To support derived classes of webview

I use Cordova for my application,they have created a derived webview class by name CordovaWebview. 
When I run the calabash scripts I get "Currently queries are only supported for webviews" exception as we expect a exact match to "webview". 
To fix it, I have changed the unless condition to check for views that ends with "webview", as this will cover all the derived classes of webview.