Rename error types with ACLOUD prefix.

Bug: 162375190
Test: acloud-dev create --boot-timeout 10 --report-file report.json
Change-Id: I1c8523db76025b9b1e23541b76921c7b70db5f98
diff --git a/public/actions/common_operations.py b/public/actions/common_operations.py
index cf4a8c2..6dff168 100644
--- a/public/actions/common_operations.py
+++ b/public/actions/common_operations.py
@@ -34,10 +34,10 @@
 logger = logging.getLogger(__name__)
 _ERROR_TYPE = "error_type"
 _DICT_ERROR_TYPE = {
-    constants.STAGE_INIT: "INITIALIZE_ERROR",
-    constants.STAGE_GCE: "CREATE_GCE_ERROR",
-    constants.STAGE_ARTIFECT: "DOWNLOAD_ARTIFECT_ERROR",
-    constants.STAGE_BOOT_UP: "BOOT_UP_ERROR",
+    constants.STAGE_INIT: "ACLOUD_INIT_ERROR",
+    constants.STAGE_GCE: "ACLOUD_CREATE_GCE_ERROR",
+    constants.STAGE_ARTIFECT: "ACLOUD_DOWNLOAD_ARTIFACT_ERROR",
+    constants.STAGE_BOOT_UP: "ACLOUD_BOOT_UP_ERROR",
 }