[ONES] Fill ONES mock method with real request

Related issue: #1161 (closed)

What does this MR do and why?

Fill ONES mock method with real request.

Since the ONES model and ONES query client are split into two separate MRs: !733 (merged) and !883 (merged)

In the previous model MR, the method that checks that ONES project is available is returned directly to { success: true }.

Current MR fills ONES mock method with real request.