ansible_freeipa_module: New api_get_basedn, IPAAnsibleModule.ipa_get_basedn

These functions have been added to get the basedb from api.env for use
with DN for example.

api_get_basedn is returning api.env.basedn
IPAAnsibleModule.ipa_get_basedn is a wrapper for api_get_basedn

plugins/module_utils/ansible_freeipa_module.py

@@ -419,6 +419,9 @@ else:
     def api_get_realm():
         return api.env.realm
 
+    def api_get_basedn():
+        return api.env.basedn
+
     def gen_add_del_lists(user_list, res_list):
         """
         Generate the lists for the addition and removal of members.
@@ -882,6 +885,11 @@ else:
             """Retrieve IPA API realm."""
             return api_get_realm()
 
+        @staticmethod
+        def ipa_get_basedn():
+            """Retrieve IPA API basedn."""
+            return api_get_basedn()
+
         @staticmethod
         def ipa_command_exists(command):
             """