Add uniqueness plugin configuration for sudorule cn

We do a search looking for duplicate values but this leaves open the
possibility that two adds are happening at the same time so both
searches return NotFound therefore we get two entries with the same
cn value.

https://fedorahosted.org/freeipa/ticket/3017

install/share/unique-attributes.ldif

@@ -70,6 +70,24 @@ nsslapd-pluginVersion: 1.1.0
 nsslapd-pluginVendor: Fedora Project
 nsslapd-pluginDescription: Enforce unique attribute values
 
+dn: cn=sudorule name uniqueness,cn=plugins,cn=config
+changetype: add
+objectClass: top
+objectClass: nsSlapdPlugin
+objectClass: extensibleObject
+cn: sudorule name uniqueness
+nsslapd-pluginDescription: Enforce unique attribute values
+nsslapd-pluginPath: libattr-unique-plugin
+nsslapd-pluginInitfunc: NSUniqueAttr_Init
+nsslapd-pluginType: preoperation
+nsslapd-pluginEnabled: on
+nsslapd-pluginarg0: cn
+nsslapd-pluginarg1: cn=sudorules,cn=sudo,$SUFFIX
+nsslapd-plugin-depends-on-type: database
+nsslapd-pluginId: NSUniqueAttr
+nsslapd-pluginVersion: 1.1.0
+nsslapd-pluginVendor: Fedora Project
+
 #dn: cn=uid uniqueness,cn=plugins,cn=config
 #objectClass: top
 #objectClass: nsSlapdPlugin

install/updates/10-uniqueness.update

@@ -0,0 +1,16 @@
+dn: cn=sudorule name uniqueness,cn=plugins,cn=config
+default:objectClass: top
+default:objectClass: nsSlapdPlugin
+default:objectClass: extensibleObject
+default:cn: sudorule name uniqueness
+default:nsslapd-pluginDescription: Enforce unique attribute values
+default:nsslapd-pluginPath: libattr-unique-plugin
+default:nsslapd-pluginInitfunc: NSUniqueAttr_Init
+default:nsslapd-pluginType: preoperation
+default:nsslapd-pluginEnabled: on
+default:nsslapd-pluginarg0: cn
+default:nsslapd-pluginarg1: cn=sudorules,cn=sudo,$SUFFIX
+default:nsslapd-plugin-depends-on-type: database
+default:nsslapd-pluginId: NSUniqueAttr
+default:nsslapd-pluginVersion: 1.1.0
+default:nsslapd-pluginVendor: Fedora Project

install/updates/Makefile.am

@@ -11,6 +11,7 @@ app_DATA =				\
 	10-sudo.update			\
 	10-ssh.update			\
 	10-bind-schema.update		\
+	10-uniqueness.update		\
 	19-managed-entries.update	\
 	20-aci.update			\
 	20-dna.update			\