EVA-1077, EVA-1092, EVA-1098 - Accommodate lookup benchmarking
Created by: sundarvenkata-EBI
- Added lookup benchmark samplers for Cassandra and MongoDB
- Updated write samplers for Cassandra and MongoDB to remove timestamp components from IDs and use randomized ID components (thread choice, thread number, iteration index, record number) instead
- Added read, write and lookup benchmark samplers for Postgres