feat: add cobbler profile

- add datavol to cobbler nodes
- add cobbler profile
- add cobbler role hieradata
- manage selinux where required for cobbler
- manage service cname

hieradata/roles/infra/cobbler/server.yaml

@@ -0,0 +1,17 @@
+---
+profiles::packages::install:
+  - cobbler
+  - cobbler3.2-web
+  - httpd
+  - syslinux
+  - dnf-plugins-core
+  - debmirror
+  - pykickstart
+  - fence-agents
+  - selinux-policy-devel
+  - ipxe-bootimgs
+
+profiles::pki::vault::alt_names:
+  - cobbler.main.unkin.net
+
+profiles::cobbler::server::service_cname: 'cobbler.main.unkin.net'