ipasudorule: Fix category reset for idempotency

A repeated category reset of usercategory, hostcategory, cmdcaterory,
runasusercategory and hostcategory is resulting in the error
"no modifications to be performed".

The empty categories are now removed from the args if the category is
not set in the sudorule.

plugins/modules/ipasudorule.py

@@ -416,6 +416,32 @@ def main():
                 if action == "sudorule":
                     # Found the sudorule
                     if res_find is not None:
+                        # Remove empty usercategory, hostcategory,
+                        # cmdcaterory, runasusercategory and hostcategory
+                        # from args if "" and if the category is not in the
+                        # sudorule. The empty string is used to reset the
+                        # category.
+                        if "usercategory" in args \
+                           and args["usercategory"] == "" \
+                           and "usercategory" not in res_find:
+                            del args["usercategory"]
+                        if "hostcategory" in args \
+                           and args["hostcategory"] == "" \
+                           and "hostcategory" not in res_find:
+                            del args["hostcategory"]
+                        if "cmdcategory" in args \
+                           and args["cmdcategory"] == "" \
+                           and "cmdcategory" not in res_find:
+                            del args["cmdcategory"]
+                        if "ipasudorunasusercategory" in args \
+                           and args["ipasudorunasusercategory"] == "" \
+                           and "ipasudorunasusercategory" not in res_find:
+                            del args["ipasudorunasusercategory"]
+                        if "ipasudorunasgroupcategory" in args \
+                           and args["ipasudorunasgroupcategory"] == "" \
+                           and "ipasudorunasgroupcategory" not in res_find:
+                            del args["ipasudorunasgroupcategory"]
+
                         # For all settings is args, check if there are
                         # different settings in the find result.
                         # If yes: modify