Revert "Upgrade puppet on puppet master"
Revert "Upgrade puppet on puppet master"

This reverts commit 20eb6cc260d03d867f862d1d1484fe8732f0662a.

This causes errors when 2.7.22 client is used against a 2.7.22 master.

alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet