Exception handling for Provider#verify_credentials belongs in the models
Exception handling for Provider#verify_credentials belongs in the models

https://bugzilla.redhat.com/show_bug.cgi?id=1337233
(transferred from ManageIQ/manageiq@1ac3595cec4d73a8764cce06958b93e84565a41e)

ManageIQ/manageiq-ui-classic,ManageIQ/manageiq-ui-classic,ManageIQ/manageiq-ui-classic,ManageIQ/manageiq-ui-classic