Add Web UI counterpart of following CLI commands: * trust-fetch-domains Refresh list of the domains associated with the trust * trustdomain-del Remove infromation about the domain associated with the trust. * trustdomain-disable Disable use of IPA resources by the domain of the trust * trustdomain-enable Allow use of IPA resources by the domain of the trust * trustdomain-find Search domains of the trust https://fedorahosted.org/freeipa/ticket/4119
http://www.freeipa.org/page/UI_Unit_Tests