Allow the memory usage to be set for this applications nagios checks
Allow the memory usage to be set for this applications nagios checks

The limit was raised in https://github.com/alphagov/govuk-puppet/pull/5581/commits/987b34b3da3f904b21f081975ea90ba0e0baca6e
but the class doesn't know how to process the values. Adding these params
will allow the new values to be used.

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