Add support to fetch old style junos facts (#25250)

* Add support to fetch old style junos facts

Fixes #25050

Add support to fetch old style facts supported in Ansible <= 2.2
To fetch old style facts value `gather_subset` value shoule be `all`
and `junos-eznc` is required to be installed on control node as a
prerequisite.

* Remove unwanted import

lib/ansible/module_utils/junos.py

@@ -191,3 +191,6 @@ def load_config(module, candidate, warnings, action='merge', commit=False, forma
                 discard_changes(module)
 
         return diff
+
+def get_param(module, key):
+    return module.params[key] or module.params['provider'].get(key)