use Urpmi to upgrade perl

Perform the following in the specified order to prevent breaking urpmi

•  Always upgrade urpmi first
  urpmi urpmi
• Use rpm to query all installed perl packages and display only package names (without distributions)
  rpm -qa --qf '%{name}\n' | grep -i perl
• Feed the results of the above query to urpmi (to upgrade all perl related packages)
urpmi `rpm -qa --qf '%{name}\n' | grep -i perl`