[Engine-devel] new ovirt-engine-sdk features (form 3.1 till now)

- allow persistent_auth via localhost - make /filter header global rather than method driven #857018 - throw error when connecting to ssl site using http protocol - raise NoCertificatesError only when no ca_file specified - several rebases to include latest engine features -- Michael Pasternak RedHat, ENG-Virtualization R&D