Fix non-matching defaults. (#5452) (#5454)

(cherry picked from commit f84a9bf932)

plugins/modules/net_tools/ldap/ldap_entry.py

@@ -36,6 +36,7 @@ options:
         entries are never modified. To assert specific attribute values on an
         existing entry, use M(community.general.ldap_attrs) module instead.
     type: dict
+    default: {}
   objectClass:
     description:
       - If I(state=present), value or list of values to use when creating