'Create a new initiator group containing the given initiators.
:param array: the array serial number
:param init_group_name: the initiator group name
:param init_list: the list of initiators
:param extra_specs: extra specifications'

def create_initiator_group(self, array, init_group_name, init_list, extra_specs):

    new_ig_data = {'executionOption': 'ASYNCHRONOUS', 'hostId': init_group_name, 'initiatorId': init_list}
    (sc, job) = self.create_resource(array, SLOPROVISIONING, 'host', new_ig_data)
    self.wait_for_job('create    initiator    group', sc, job, extra_specs)
