ABOS SOTS new layer

This is a new store and new layer for the abos_sots dataset. This
is suppose to replace the old layers/harvesters. A dummy RC record
is link to this layer which will need to be modified before prod.
The harvester needs to be redeployed to RC before reviewing this
layer
Merge pull request #214 from aodn/abos_sots_layer

ABOS SOTS new layer