default behavior for baseTeamManager

Project/Assets/ML-Agents/Examples/Hallway/Scripts/HallwayCollabAgent.cs

-using System.Collections;
-using Unity.MLAgents;
+using Unity.MLAgents.Extensions.Teams;
 using Unity.MLAgents.Actuators;
 using Unity.MLAgents.Sensors;
 
         base.Initialize();
         if (isSpotter)
         {
-            var teamManager = new HallwayTeamManager();
+            var teamManager = new BaseTeamManager();
             SetTeamManager(teamManager);
             teammate.SetTeamManager(teamManager);
         }

Project/Assets/ML-Agents/Examples/Hallway/Scripts/HallwayTeamManager.cs

 {
     List<Agent> m_AgentList = new List<Agent> { };
 
-
-    public override void OnAgentDone(Agent agent, Agent.DoneReason doneReason, List<ISensor> sensors)
-    {
-        agent.SendDoneToTrainer();
-    }
+    // public override void OnAgentDone(Agent agent, Agent.DoneReason doneReason, List<ISensor> sensors)
+    // {
+
+    // }
-    public override void AddTeamReward(float reward)
-    {
+    // public override void AddTeamReward(float reward)
+    // {
-    }
+    // }
 }

com.unity.ml-agents.extensions/Runtime/Teams/BaseTeamManager.cs

 {
     public class BaseTeamManager : ITeamManager
     {
-        readonly string m_Id = System.Guid.NewGuid().ToString();
+        private readonly string m_Id = System.Guid.NewGuid().ToString();
-            throw new System.NotImplementedException();
+
         }
 
         public virtual void OnAgentDone(Agent agent, Agent.DoneReason doneReason, List<ISensor> sensors)
             // If so, we'll need dummy sensor impls with the same shape as the originals.
-            throw new System.NotImplementedException();
+            agent.SendDoneToTrainer();
         }
 
         public virtual void AddTeamReward(float reward)