pt-config-diff recommend wrong software update when using PXC

[Frederic Descamps]

When running pt-config-diff against PXC node and as PXC is always released with some delays compare to PS, the tool notifies that there is an update which is not true:

mysql> status
--------------
mysql Ver 14.14 Distrib 5.5.30, for Linux (x86_64) using readline 5.1

Connection id: 1128526
Current database:
Current user: debian-sys-maint@127.0.0.1
SSL: Not in use
Current pager: stdout
Using outfile: ''
Using delimiter: ;
Server version: 5.5.30-30.2-log Percona Server (GPL), Release 30.2, wsrep_23.7.4.r3843
Protocol version: 10
Connection: 127.0.0.1 via TCP/IP
Server characterset: latin1
Db characterset: latin1
Client characterset: utf8
Conn. characterset: utf8
TCP port: 3306
Uptime: 17 days 20 hours 53 min 45 sec

#pt-config-diff --version-check localhost sql03

# A software update is available:
# * The current version for Percona Server (GPL) is 5.5.31-30.3.

[Frederic Descamps (lefred)]

#pt-config-diff --version
pt-config-diff 2.2.2

[Shahriyar Rzayev (rzayev-sehriyar)]

Percona now uses JIRA for bug reports so this bug report is migrated to: https://jira.percona.com/browse/PT-1121