May be a Govt. sanctioned amount for now. Each of those can probably hold as many as 4 medium fighters if needed.
4 might be too many. If we compare the size with a Sukhoi and its normal hangers under construction, I think they are designed to house one Sukhoi (may be at most 2 medium fighters).
At first I thought the two per airbase may be to house the QAR aircrafts. But then, if you look at their placement, they are located far from the runway in some cases.