Major Description
When the random walk test code was moved from accumulo to the accumulo-testing repo, there was code in random walk that killed tablet servers, shutdown accumulo, started accumulo, etc. This code was removed as the RW tests are now run in YARN to simplify deployment. Also, RW can used agitation code for continuous ingest. Agitation code should be separated from continuous ingest so it can be used by any test. When doing this, a shutdown capability should be added as this used to be part of RW.