added some comments to the disaggregation nrml schema
added some comments to the disaggregation nrml schema


Former-commit-id: 22d0bbe830471ce0d387c06ae5275e00addf9b37 [formerly 9624834f20f740a14f9f36fd84028956046e5c28] [formerly 9624834f20f740a14f9f36fd84028956046e5c28 [formerly 3517d69e7247d4f75a6b978dea6396f65909e374]]
Former-commit-id: 04a4f0cf2d9f20131bd22caccd0a1ebef1418557
Former-commit-id: ad39358ef392048fe3b68236d97e11e8c80cef55
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine