Expose the disabled User Auth Type

Additionally, fix a small bug in ipa-kdb so that the disabled User
Auth Type is properly handled.

https://fedorahosted.org/freeipa/ticket/4720

Reviewed-By: Petr Vobornik <pvoborni@redhat.com>

install/ui/src/freeipa/serverconfig.js

@@ -78,6 +78,7 @@ return {
                             name: 'ipauserauthtype',
                             flags: ['w_if_no_aci'],
                             options: [
+                                { label: '@i18n:authtype.type_disabled', value: 'disabled' },
                                 { label: '@i18n:authtype.type_password', value: 'password' },
                                 { label: '@i18n:authtype.type_radius', value: 'radius' },
                                 { label: '@i18n:authtype.type_otp', value: 'otp' }

install/ui/test/data/ipa_init.json

@@ -53,6 +53,7 @@
                         "type_otp": "Two factor authentication (password + OTP)",
                         "type_password": "Password",
                         "type_radius": "Radius",
+                        "type_disabled": "Disable per-user override",
                         "user_tooltip": "Per-user setting, overwrites the global setting if any option is checked."
                     },
                     "buttons": {