Add api of report summary, get more detail of price info

Now we can just get total price specify a user or a tenant by api `/v1/report/total`with available unnecessary params:(tenant_id, begin, end)

i think it's necessary to expand this api to suppor more detail price like:

-- get total rate of each tenant;
-- get total rate of each resource type;
-- get total rate of each resource and type;
-- order by rate

as sql: select tenant_id, sum(rate) from rated_data_frames group by tenant_id, res_type order by sum(rate);