Revert "Assign recursive dns roles to acamar/achernar"

This reverts commit a9dd692f662b5e11467c66525c72f53ae580f5e5.

We really need to complete the TODOs listed in the commit message of the
reverted change first

Change-Id: Ia861d8d62c9ae6dc90ae196c26445cf25eac5132