NewClientServerPair creates a pair of Nomad agents: 1 server, 1 client.

NewMixedAgent creates a new Nomad agent in mixed server+client mode but does not start the agent process until the Start() method is called.

Conf enum is for configuring either a client, server, or mixed agent.

BaseDir is where tests will store state and can be overridden by setting NOMAD_TEST_DIR.

NomadAgent manages an external Nomad agent process.