percona-toolkit,xtrabackup: disable remote version check (important)

percona-toolkit and xtrabackup were updated:

• disable automatic version check for all tools
  [bnc#864194] Prevents transmission of version information
  to an external host in the default configuration.
  CVE-2014-2029 Can be used by owner of a Percona Server
  (or an attacker who can control this destination for the
  client) to collect arbitrary MySQL configuration
  parameters and execute commands (with -v). Now the
  version check needs to be requested via command line or
  global/tool specific/user configuration. (–version-check)
• added /etc/percona-toolkit/percona-toolkit.conf
  configuration directory and template configuration file