Correct behavior for sudorunasgroup vs sudorunasuser

https://fedorahosted.org/freeipa/ticket/1309

install/updates/10-schema_compat.update

@@ -0,0 +1,2 @@
+dn: cn=sudoers,cn=Schema Compatibility,cn=plugins,cn=config
+replace: schema-compat-entry-attribute:'sudoRunAsGroup=%deref("ipaSudoRunAs","cn")::sudoRunAsGroup=%deref_f("ipaSudoRunAsGroup","(objectclass=posixGroup)","cn")'

install/updates/Makefile.am

@@ -12,6 +12,7 @@ app_DATA =				\
 	20-indices.update		\
 	20-nss_ldap.update		\
 	20-replication.update		\
+	10-schema_compat.update		\
 	20-user_private_groups.update	\
 	20-winsync_index.update		\
 	21-replicas_container.update	\