Configure server to PXE perform a one off PXE boot

    CLI Example:

    .. code-block:: bash

        salt dell drac.server_pxe

def server_pxe():
    '''
    Configure server to PXE perform a one off PXE boot

    CLI Example:

    .. code-block:: bash

        salt dell drac.server_pxe
    '''
    if __execute_cmd('config -g cfgServerInfo -o \
            cfgServerFirstBootDevice PXE'):
        if __execute_cmd('config -g cfgServerInfo -o cfgServerBootOnce 1'):
            return server_reboot
        else:
            log.warning('failed to set boot order')
            return False

    log.warning('failed to configure PXE boot')
    return False