Upgrade Mongo To 2.6.12 In Integration Only
Upgrade Mongo To 2.6.12 In Integration Only

Change accidently, left out of previous commit:
https://github.com/alphagov/govuk-puppet/pull/10305

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