bump pxe_bootstrap: disable get_urling upgrade.img and selinux
bump pxe_bootstrap: disable get_urling upgrade.img and selinux

https://github.com/CSC-IT-Center-for-Science/ansible-role-pxe_bootstrap/releases/tag/v1.4.0

https://github.com/CSC-IT-Center-for-Science/ansible-role-pxe_bootstrap/issues/9

mantti/fgci-tut,mantti/fgci-tut,mantti/fgci-tut,CSC-IT-Center-for-Science/fgci-ansible