feat: complete cobbler automation

- add facts to manage the /var/www/cobbler and /data/cobbler directories
- move /var/www/cobbler -> /data/cobbler
- create symlink from /var/www/cobbler -> /data/cobbler
- ensure that cobbler nodes are set to permissive selinux mode

modules/libs/lib/facter/cobbler_data_dir_exists.rb

@@ -0,0 +1,8 @@
+# frozen_string_literal: true
+
+Facter.add('cobbler_data_dir_exists') do
+  confine enc_role: 'roles::infra::cobbler::server'
+  setcode do
+    File.exist?('/data/cobbler')
+  end
+end

modules/libs/lib/facter/cobbler_var_www_exists.rb

@@ -0,0 +1,8 @@
+# frozen_string_literal: true
+
+Facter.add('cobbler_var_www_exists') do
+  confine enc_role: 'roles::infra::cobbler::server'
+  setcode do
+    File.exist?('/var/www/cobbler')
+  end
+end

modules/libs/lib/facter/cobbler_var_www_islink.rb

@@ -0,0 +1,8 @@
+# frozen_string_literal: true
+
+Facter.add('cobbler_var_www_islink') do
+  confine enc_role: 'roles::infra::cobbler::server'
+  setcode do
+    File.exist?('/var/www/cobbler') and File.symlink?('/var/www/cobbler')
+  end
+end