Fix JupyterHub SELinux context

[cmd-ntrf]

• Make root owner of /opt/jupyterhub
• Create directory /var/run/jupyterhub
• Make jupyterhub owner of /var/run/jupyterhub
• Move jupyterhub.service run directory to /var/run/jupyterhub
• Remove login.te SELinux module
• Make user jupyterhub shell nologin
• Put jupyterhub_config.py in /etc/jupyterhub
• Output jupyterhub log in /var/log
• Add exec restorecon -r -F /opt/jupyterhub
• Fix jupyterhub service selinux run context (currently unconfined_service_t)