Add TubeRack persistence spec.
.. some specs passing ...
All specs passes, but 2 (delete)
[fixes #42646191] Add TubeRack persistence
Clean :focus tags.
Update doc
Bump version to 0.24.0
Merge pull request #85 from maxigit/42646191_add_racktube_peristence

42646191 add racktube peristence
[fixes #42960865] Add missing foregin keys
Merge pull request #86 from maxigit/42960865_add_foreign_keys_to_all_table

[fixes #42960865] Add missing foregin keys
[#42961051 - fixes] Fix TransferWellsToTube action
rename spec and bump version.
Merge pull request #88 from maxigit/42227623_add_create_labels_spec_in_api

[#42961051 - fixes] Fix TransferWellsToTube action
Merge branch 'development' of github.com:sanger/lims-core into 42646797_add_rack_transfer_action
[#42646797] Tube rack transfer specs pass