Get benchmark workflow running

[reuster986]

I have created a branch with a benchmark workflow script (https://github.com/Bears-R-Us/arkouda/blob/workflow-benchmark/benchmarks/workflow.py) that is intended to simulate a full workflow involving a lot of the akutil functionality we recently ported in. For now, I'm trying to get it to run in correctness-only mode with the following command:

util/test/runClient -nl 1 benchmarks/workflow.py --correctness-only

However, I've run into a few errors so far, and rather than modify the script to try to work around them, I figured I would open an issue so that we can make the necessary fixes to arkouda and track them here. Thus, the goal of this issue is to get benchmarks/workflow.py running in correctness mode without error.