Bug 1094007 - PHP cart: update pear.php.net channel when install

This patch fixes the warning: channel "pear.php.net" has updated
its protocols, use "pear channel-update pear.php.net" to update.
Merge pull request #5609 from vbalazs/bvarga/bug_1094007_php_cart_update_pear_php_channel_when_install

Merged by openshift-bot