Add PLDM.Requester interface

This interface has APIs that help PLDM requester apps on the BMC to
construct PLDM request messages.

Also introduce the exception
xyz.openbmc_project.Common.Error.TooManyResources, which is analogous to
the errno ENFILES.

Signed-off-by: Deepak Kodihalli <dkodihal@in.ibm.com>
Change-Id: I79632bccb002d5afabd4381ae27a0b7ac6476aa7
3 files changed