AccountPolicy: InvalidArgument for min password

Values less than the pre-defined lower limit are not allowed so trying
to set them should result in a distinct error; add InvalidArgument for
that case.

Signed-off-by: Paul Fertser <fercerpav@gmail.com>
Change-Id: I1c589e2ce8a2823564034eb370f571a9663650f6
diff --git a/yaml/xyz/openbmc_project/User/AccountPolicy.interface.yaml b/yaml/xyz/openbmc_project/User/AccountPolicy.interface.yaml
index 1d04006..b55b288 100644
--- a/yaml/xyz/openbmc_project/User/AccountPolicy.interface.yaml
+++ b/yaml/xyz/openbmc_project/User/AccountPolicy.interface.yaml
@@ -29,6 +29,7 @@
           set to higher one for security reasons.
       errors:
           - xyz.openbmc_project.Common.Error.InternalFailure
+          - xyz.openbmc_project.Common.Error.InvalidArgument
 
     - name: RememberOldPasswordTimes
       type: byte