Madhu

Fixes #432 partially. aggrMethod can take multiple aggregations using comma separation.

We are trying to execute QuantumLeap APIs via jmeter script. But some of the APIs result into 500 error. Below are the configurations for API execution: **API:** GET http://host/v2/entities/tid1/attrs/pressure?type=typ&limit=100&offset=1534&fromDate=2022-06-02T00:00:00Z&toDate=2022-07-04T23:59:59Z **Throughput:**...