Remove role lmn_teacherlaptop and extend role lmn_security

- Add variable to configure sudo-program permissions (`sudo_permissions`)
- Add variable to configure polkit-rules (`polkit_rules`)
- Migrate sudo and polkit permissions from lmn_teacherlaptop role to inventory

roles/lmn_security/templates/polkit_rules.j2

@@ -0,0 +1,12 @@
+// /etc/polkit-1/rules.d/lmn-security.rules
+
+polkit.addRule(function(action, subject) {
+{% for group, privlist in polkit_rules.items() %}
+    if (subject.isInGroup("{{ group }}")){
+    {% for priv in privlist %}
+        if (action.id == "{{ priv }}") { return polkit.Result.YES; }
+    {% endfor %}
+    }
+{% endfor %}
+});
+