Add Python test for arkouda_server startup with --authenticate flag
As a follow up to GH#714 we need to add a test for server start-up with the --authenticate flag. (Working that bug-fix I started making a larger set of changes to the python testing code and it got big enough to warrant its own ticket.) @pierce314159 is going to work this ticket with me to get some experience in the code base.
The test will launch an arkouda_server instance with the --authenticate flag and test a connection via client with the ruok/imok command/response.
@Bears-R-Us/arkouda-core-dev does this test cover this issue? https://github.com/Bears-R-Us/arkouda/blob/master/tests/security_test.py
@hokiegeek2 - do you have any thoughts on this? @pierce314159 was not 100% sure if it is still required.