Fix android device test

Author: bootstraponline

android_tests/lib/android/specs/driver.rb

@@ -34,7 +34,8 @@ def is_sauce
       expected            = { caps:             { platformName: 'android',
                                                   app:          'api.apk',
                                                   appPackage:   'io.appium.android.apis',
-                                                  appActivity:  '.ApiDemos', },
+                                                  appActivity:  '.ApiDemos',
+                                                  deviceName:   'Nexus 7', },
                               custom_url:       false,
                               export_session:   false,
                               default_wait:     1,