Return iSCSI IQN from an AIX host.

def _aix_iqn():
    '''
    Return iSCSI IQN from an AIX host.
    '''
    ret = []

    aix_cmd = 'lsattr -E -l iscsi0 | grep initiator_name'

    aix_ret = salt.modules.cmdmod.run(aix_cmd)
    if aix_ret[0].isalpha():
        try:
            ret.append(aix_ret.split()[1].rstrip())
        except IndexError:
            pass
    return ret