truncate databases

[FreddieAkeroyd]

In preparation for cycle we need to trim databases - instructions on how to contact scientists and do the truncation aer at https://github.com/ISISComputingGroup/ibex_developers_manual/wiki/Database-Troubleshooting#reducing-database-disc-space

Started

• [x] chronus
• [x] detmon
• [x] imat
• [x] ines
• [x] inter
• [x] let
• [x] mari
• [x] merlin
• [x] muonfe
• [x] osiris
• [x] polref
• [x] rikenfe
• [x] sandals
• [x] tosca

completed

• [x] chronus
• [x] detmon
• [x] imat
• [x] ines
• [x] inter
• [x] let
• [x] mari
• [x] merlin
• [x] muonfe
• [x] osiris
• [x] polref
• [x] rikenfe
• [x] sandals
• [x] tosca