Merge changes I677dff58,I5748fbbb,I7803be1e

* changes:
  Remove microdroid_payload.json
  microdroid_manager waits for task to exit
  Refactor MicrodroidTestCase
diff --git a/TEST_MAPPING b/TEST_MAPPING
index 15099da..13c68d7 100644
--- a/TEST_MAPPING
+++ b/TEST_MAPPING
@@ -2,6 +2,9 @@
   "postsubmit": [
     {
       "name": "MicrodroidHostTestCases"
+    },
+    {
+      "name": "VirtualizationTestCases"
     }
   ],
   "imports": [