'Reconfigure backing VM with the given spec.'

def _reconfigure_backing(self, backing, reconfig_spec):

    LOG.debug('Reconfiguring    backing    VM:    %(backing)s    with    spec:    %(spec)s.', {'backing': backing, 'spec': reconfig_spec})
    reconfig_task = self._session.invoke_api(self._session.vim, 'ReconfigVM_Task', backing, spec=reconfig_spec)
    LOG.debug('Task:    %s    created    for    reconfiguring    backing    VM.', reconfig_task)
    self._session.wait_for_task(reconfig_task)
