Fix typo in ipapwpolicy.py

The 'maxsequence' attribute was never applied as there was a typo when
it was set. By fixing the field name, 'maxsequence' is correclty set.

The failure was not seen before due to missing tests. The tests will be
added in a separate PR.

plugins/modules/ipapwpolicy.py

@@ -197,7 +197,7 @@ def gen_args(module,
     if maxrepeat is not None:
         _args["ipapwdmaxrepeat"] = maxrepeat
     if maxsequence is not None:
-        _args["ipapwdmaxrsequence"] = maxsequence
+        _args["ipapwdmaxsequence"] = maxsequence
     if dictcheck is not None:
         if module.ipa_check_version("<", "4.9.10"):
             # Allowed values: "TRUE", "FALSE", ""