MUSR: bug in dynamic trans/long component

[FreddieAkeroyd]

On MUSR a configuration was loading the "musr long (dynamic)" component but failed to respond to a change to trans orientation, so was using the values from longitudinal for zerofield sensor matrix etc.

See https://github.com/ISISComputingGroup/ibex_developers_manual/wiki/Dynamic-components-(component-switcher)

Acceptance criteria

• [ ] issue fixed
• [ ] tests added (important - not sure of dynamic components are tested much?)

[FreddieAkeroyd]

Actually probably not a bug, relies on reading IN:MUSR:MUSR_ROTATION PV and Transverse -> transverse meaning JSON lookup no longer happened.

[FreddieAkeroyd]

Resolved - this was due to a change of Transverse -> transverse in custom_records.db when trying to fix another issue, everything is actually working fine