Make YCSB_WORKLOAD_DIR_NAME path dynamic (#1477)
Make YCSB_WORKLOAD_DIR_NAME path dynamic (#1477)

Signed-off-by: kirecek <2e48fc91df1c0a93824079ebac0e1d448788fcb3@gmail.com>
GoogleCloudPlatform/PerfKitBenchmarker,GoogleCloudPlatform/PerfKitBenchmarker,GoogleCloudPlatform/PerfKitBenchmarker,GoogleCloudPlatform/PerfKitBenchmarker