Merge branch 'master' into simulation_capture_upgrade

.yamato/upm-ci-testprojects.yml

     - pip install unity-downloader-cli --index-url https://artifactory.prd.it.unity3d.com/artifactory/api/pypi/pypi/simple --upgrade
     - unity-downloader-cli -u {{ editor.version }} -c editor -c StandaloneSupport-IL2CPP -c Linux --wait --published
     {% if suite.name == "standalone" %}
-    - utr/utr --testproject=./TestProjects/{{project.name}} --editor-location=./.Editor --artifacts_path=test-results --stdout-filter=minimal --extra-editor-arg="--force-d3d11" {{suite.args}}StandaloneWindows64
+    - utr/utr --testproject=./TestProjects/{{project.name}} --editor-location=./.Editor --reruncount=2 --artifacts_path=test-results --stdout-filter=minimal --extra-editor-arg="--force-d3d11" {{suite.args}}StandaloneWindows64
-    - utr/utr --testproject=./TestProjects/{{project.name}} --editor-location=./.Editor --artifacts_path=test-results --stdout-filter=minimal --extra-editor-arg="--force-d3d11" {{suite.args}}
+    - utr/utr --testproject=./TestProjects/{{project.name}} --editor-location=./.Editor --reruncount=2 --artifacts_path=test-results --stdout-filter=minimal --extra-editor-arg="--force-d3d11" {{suite.args}}
     {% endif %}
   artifacts:
     logs:
     - git clone git@github.cds.internal.unity3d.com:unity/utr.git utr
     - unity-downloader-cli -u {{ editor.version }} -c editor -c StandaloneSupport-IL2CPP -c Linux --wait --published
     {% if suite.name == "standalone" %}
-    - DISPLAY=:0.0 utr/utr --testproject=./TestProjects/{{project.name}} --editor-location=.Editor --artifacts_path=test-results --stdout-filter=minimal --extra-editor-arg="--force-vulkan" {{suite.args}}StandaloneLinux64
+    - DISPLAY=:0.0 utr/utr --testproject=./TestProjects/{{project.name}} --editor-location=.Editor --reruncount=2 --artifacts_path=test-results --stdout-filter=minimal --extra-editor-arg="--force-vulkan" {{suite.args}}StandaloneLinux64
-    - DISPLAY=:0.0 utr/utr --testproject=./TestProjects/{{project.name}} --editor-location=.Editor --artifacts_path=test-results --stdout-filter=minimal --extra-editor-arg="--force-vulkan" {{suite.args}}
+    - DISPLAY=:0.0 utr/utr --testproject=./TestProjects/{{project.name}} --editor-location=.Editor --reruncount=2 --artifacts_path=test-results --stdout-filter=minimal  --extra-editor-arg="--force-vulkan" {{suite.args}}
     {% endif %}
   artifacts:
     logs:

com.unity.perception/Documentation~/Randomization/Scenarios.md

 2. Make sure to include the [Serializable] attribute on a constant class. This will ensure that the constants can be manipulated from the Unity inspector.
 3. By default, UnityEngine.Object class references cannot be serialized to JSON in a meaningful way. This includes Monobehaviors and SerializedObjects. For more information on what can and can't be serialized, take a look at the [Unity JsonUtility manual](https://docs.unity3d.com/ScriptReference/JsonUtility.html).
 4. A scenario class's Serialize() and Deserialized() methods can be overriden to implement custom serialization strategies.
+
+Follow the instructions below to generate a constants configuration file to modify your scenario constants in a built player:
+1. Click the serialize constants button in the scenario's inspector window. This will generate a constants.json file and place it in the project's Assets/StreamingAssets folder.
+2. Build your player. The new player will have a [ProjectName]_Data/StreamingAssets folder. A copy of the constants.json file previously constructed in the editor will be found in this folder.
+3. Change the contents of the constants file. Any running player thereafter will utilize the newly authored constants values.

com.unity.perception/package.json

     "com.unity.entities": "0.8.0-preview.8",
     "com.unity.simulation.client": "0.0.10-preview.9",
     "com.unity.simulation.capture": "0.0.10-preview.14",
-    "com.unity.simulation.core": "0.0.10-preview.19"
+    "com.unity.simulation.core": "0.0.10-preview.20"
   },
   "description": "Tools for generating large-scale data sets for perception-based machine learning training and validation",
   "displayName": "Perception",