Initial grouping of ipalib plugins for ipa help

This patch makes one group for all HBAC plugins and one group for all
sudo plugins.

ipalib/plugins/hbacrule.py

@@ -85,6 +85,8 @@ from ipalib import AccessTime, Password, Str, StrEnum
 from ipalib.plugins.baseldap import *
 from ipalib import _, ngettext
 
+topic = ('hbac', 'Host based access control commands')
+
 def is_all(options, attribute):
     """
     See if options[attribute] is lower-case 'all' in a safe way.

ipalib/plugins/hbacsvc.py

@@ -45,6 +45,7 @@ from ipalib.plugins.baseldap import LDAPUpdate, LDAPSearch, LDAPRetrieve
 
 from ipalib import _, ngettext
 
+topic = ('hbac', 'Host based access control commands')
 
 class hbacsvc(LDAPObject):
     """

ipalib/plugins/hbacsvcgroup.py

@@ -45,6 +45,7 @@ from ipalib import api, errors
 from ipalib.plugins.baseldap import *
 from ipalib import _, ngettext
 
+topic = ('hbac', 'Host based access control commands')
 
 class hbacsvcgroup(LDAPObject):
     """

ipalib/plugins/sudocmd.py

@@ -40,6 +40,7 @@ from ipalib import Str
 from ipalib.plugins.baseldap import *
 from ipalib import _, ngettext
 
+topic = ('sudo', 'commands for controlling sudo configuration')
 
 class sudocmd(LDAPObject):
     """

ipalib/plugins/sudocmdgroup.py

@@ -45,6 +45,7 @@ from ipalib import Str
 from ipalib.plugins.baseldap import *
 from ipalib import _, ngettext
 
+topic = ('sudo', 'commands for controlling sudo configuration')
 
 class sudocmdgroup(LDAPObject):
     """

ipalib/plugins/sudorule.py

@@ -25,6 +25,7 @@ from ipalib import Str, StrEnum
 from ipalib.plugins.baseldap import *
 from ipalib import _, ngettext
 
+topic = ('sudo', 'commands for controlling sudo configuration')
 
 class sudorule(LDAPObject):
     """