Fix physics with navmesh agent

- desactivate navmesh temporarly when knockback (MovementHandler TakeImpulse)

- Delete unit when HealthHandler Death called

- Made 150 units fight (for performance test)

Assets/Prefabs/TestUnit.prefab

@@ -18,7 +18,7 @@ GameObject:
   - component: {fileID: 8213395333053285225}
   - component: {fileID: 8908285060348773052}
   - component: {fileID: 6587310683195830629}
-  m_Layer: 0
+  m_Layer: 6
   m_Name: TestUnit
   m_TagString: Unit
   m_Icon: {fileID: 0}
@@ -120,8 +120,8 @@ Rigidbody:
   m_UseGravity: 1
   m_IsKinematic: 0
   m_Interpolate: 0
-  m_Constraints: 0
-  m_CollisionDetection: 0
+  m_Constraints: 80
+  m_CollisionDetection: 1
 --- !u!195 &5811210244409818000
 NavMeshAgent:
   m_ObjectHideFlags: 0
@@ -151,7 +151,7 @@ CapsuleCollider:
   m_PrefabInstance: {fileID: 0}
   m_PrefabAsset: {fileID: 0}
   m_GameObject: {fileID: 2076979688870881298}
-  m_Material: {fileID: 0}
+  m_Material: {fileID: 13400000, guid: 6d59c543e7995191cbee8fab25167b46, type: 2}
   m_IncludeLayers:
     serializedVersion: 2
     m_Bits: 0
@@ -212,10 +212,11 @@ MonoBehaviour:
   m_Script: {fileID: 11500000, guid: eb03fb8c097f016f09d345ce200c3f41, type: 3}
   m_Name: 
   m_EditorClassIdentifier: 
-  damage: 10
+  damage: 20
   cooldown: 2
   attackShape: {fileID: 2074347425566192522}
-  knockback: 2
+  knockbackHorizontalForce: 8
+  knockbackVerticalForce: 5
 --- !u!114 &6587310683195830629
 MonoBehaviour:
   m_ObjectHideFlags: 0
@@ -361,7 +362,7 @@ BoxCollider:
   m_Material: {fileID: 0}
   m_IncludeLayers:
     serializedVersion: 2
-    m_Bits: 0
+    m_Bits: 64
   m_ExcludeLayers:
     serializedVersion: 2
     m_Bits: 0