Run iOS 8.4 tests during rake spec task
Run iOS 8.4 tests during rake spec task

billCTG/braintree_ios,billCTG/braintree_ios,Feverup/braintree_ios,braintree/braintree_ios,Feverup/braintree_ios,Feverup/braintree_ios,braintree/braintree_ios,billCTG/braintree_ios,apascual/braintree_ios,apascual/braintree_ios,braintree/braintree_ios,apascual/braintree_ios,apascual/braintree_ios,Feverup/braintree_ios,billCTG/braintree_ios,billCTG/braintree_ios,braintree/braintree_ios