new unsupported request common error

A common use case is where an interface or property does not support all
of the possible options to it. Create a common error for these
scenarios.

Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
Change-Id: I36b09f73adfed9244976ce21c70d02bae61bba01
diff --git a/xyz/openbmc_project/Common.metadata.yaml b/xyz/openbmc_project/Common.metadata.yaml
index a90da83..f4c3bdd 100644
--- a/xyz/openbmc_project/Common.metadata.yaml
+++ b/xyz/openbmc_project/Common.metadata.yaml
@@ -23,3 +23,8 @@
   level: INFO
 - name: ResourceNotFound
   level: INFO
+- name: UnsupportedRequest
+  level: INFO
+  meta:
+    - str: "REASON=%s"
+      type: string