Modify host event metadata to inherit callout metadata

Change-Id: I000f81b6d5e737ddbbea758a4e1c84adc09b215b
Signed-off-by: Tom Joseph <tomjoseph@in.ibm.com>
diff --git a/org/open_power/Host/Event.metadata.yaml b/org/open_power/Host/Event.metadata.yaml
index 05688ed..125f397 100644
--- a/org/open_power/Host/Event.metadata.yaml
+++ b/org/open_power/Host/Event.metadata.yaml
@@ -3,3 +3,5 @@
   meta:
     - str: "ESEL=%s"
       type: string
+  inherits:
+    - xyz.openbmc_project.Common.Callout.Inventory