Added dnf_group package module

This change adds the dnf_group package module that supports asserting presence
or absense of the promised group id on the system.

packages:
  "system-tools"
    policy => "present",
    package_module => dnf_group;

Note: Package marks (user, dep, group) influence the behavior of this module.
For example, once a package is installed directly it will retain the user mark
until explicitly re-marked.

Ticket: CFE-2852

Author: nickanderson

lib/packages.cf

@@ -100,6 +100,19 @@ body package_module apt_get
 @endif
 }
 
+body package_module dnf_group
+{
+        query_installed_ifelapsed => "$(package_module_knowledge.query_installed_ifelapsed)";
+        query_updates_ifelapsed => "$(package_module_knowledge.query_updates_ifelapsed)";
+      #default_options =>  {};
+@if minimum_version(3.12.2)
+    termux::
+        interpreter => "$(paths.bin_path)/python";
+    !termux::
+        interpreter => "$(sys.bindir)/cfengine-selected-python";
+@endif
+}
+
 body package_module zypper
 {
       query_installed_ifelapsed => "$(package_module_knowledge.query_installed_ifelapsed)";