Query output size not always accurate

Migrated from GitHub issue HumanBrainProject/hbp-validation-framework#274, opened by @shailesh on 2020-07-08.

When setting the size parameter, such as: https://validation-v2.brainsimulation.eu/results/?&size=250&from_index=0

We expect 250 results, but I currently get only 248 entries.

I tried the following combos: size 10 = output 10 size 50 = output 50 size 100 = output 100 size 150 = output 150 size 200 = output 199 size 250 = output 248 size 350 = output 348 size 1000 = output 998

Andrew's comment: Possibly because it excludes private models you don’t have access to after making the KG query. Fixing it will probably cause a performance hit.