Now that new elasticsearch servers are up and running, we need to decommission the old one.
- - ensure all services are no longer in use - done by discovery
- - production dns removed by @Gehel
- - all puppet entries removed by @Gehel
- - switch ports disabled & descriptions removed (since these will be removed from rack)
- - SSDs removed and/or HDDs wiped
- - system unracked and placed in storage
- - system mgmt dns entries removed