Incorrect method is called for vm reboot operation

[Demianyk]

Here is the list of actions which can be performed via one.vm.action XML-RPC Method of Opennebula (http://docs.opennebula.org/4.14/integration/system_interfaces/api.html#actions-for-virtual-machine-management)

• delete
• boot
• shutdown
• suspend
• hold
• stop
• resume
• release
• poweroff
• reboot
  The last operation is reboot. But in vm.py (233) we have:

def restart(self):
         '''
         Resubmits the VM after failure
         '''
         self._action('restart')

As result, error appears when trying restart a vm:

  File "/usr/local/lib/python2.7/dist-packages/oca/vm.py", line 237, in restart
    self._action('restart')
  File "/usr/local/lib/python2.7/dist-packages/oca/vm.py", line 252, in _action
    self.client.call(self.METHODS['action'], action, self.id)
  File "/usr/local/lib/python2.7/dist-packages/oca/__init__.py", line 123, in call
    raise OpenNebulaException(data)
oca.exceptions.OpenNebulaException: [VirtualMachineAction] Virtual machine action "restart" is not supported