Resolve "Test flag experiment access datasets"

Closes #408 (closed) tests on local environment:

query	load=false	load=true
?limit=25&skip=0&sortBy=startDate&sortOrder=-1&instrumentName=id32	120 ms	450 ms
?limit=25&skip=0&sortBy=startDate&sortOrder=-1&instrumentName=id21	105 ms	581 ms
?limit=25&skip=2&sortBy=startDate&sortOrder=-1&instrumentName=id21	120 ms	619 ms
?limit=10&skip=2&sortBy=startDate&sortOrder=-1&instrumentName=id21	69 ms	287 ms
?limit=25&skip=0&sortBy=startDate&sortOrder=-1&filter=released	106 ms	730 ms
?limit=25&skip=3&sortBy=startDate&sortOrder=-1&filter=released	109 ms	491 ms
?limit=50&skip=2&sortBy=startDate&sortOrder=-1&filter=released	143 ms	952 ms