ACCUMULO-802 random walk test refs non-existant namespace node
ACCUMULO-1992 Remove CachedConfiguration from examples
ACCUMULO-1981 Convert inert class to unit test
ACCUMULO-1599 Stop using /tmp wherever possible

  The only obvious remaining place I found was the Jetty temporary
  directories created by Hadoop MiniDFSCluster. These get cleaned up
  automatically when the tests pass and don't really offer much value
  for debugging test failures, so I don't consider it a high priority.
Merge branch '1.6.0-SNAPSHOT'