PLDM: Handle FRU Record Set PDR

[tomjoseph83]

There are FRUs which host manages like IO drawers and it contains additional FRUs like power supplies. FRU record set PDRs are send to BMC as part of the PDR exchange. The goal of this story is to process the FRU record set PDR, entity association records(#2816) , FRU records(#2815) and state sensor PDRs with Operational Fault Status(#2820) to create D-Bus objects for inventory managed by host. The D-Bus objects of the inventory will be hosted by the PLDM daemon.

Example of inventory D-Bus object after implementation:

busctl introspect xyz.openbmc_project.PLDM /xyz/openbmc_project/inventory/system/io_board/powersupply0
NAME                                                  TYPE      SIGNATURE RESULT/VALUE                             FLAGS
xyz.openbmc_project.Inventory.Item                    interface -         -                                        -
.Present                                              property  b         true                                     emits-change writable
.PrettyName                                           property  s         "powersupply0"                           emits-change writable
xyz.openbmc_project.Inventory.Item.PowerSupply        interface -         -                                        -
com.ibm.ipzvpd.Location                               interface -         -                                        -
.LocationCode                                         property  s         "U78DA.ND1.WZS0047-P0-C15"               emits-change writable
xyz.openbmc_project.State.Decorator.OperationalStatus interface -         -                                        -
.Functional                                           property  b         true                                     emits-change writable

This flow can be implemented without configuration JSONs. The code should be also able to handle situations to create these inventory D-Bus objects when the PLDM daemon restarts ( BMC restarts or daemon crashed and restart) while the host is up.

[lxwinspur]

I think this is epic.
#2815 #2816 and #2820 ready for review

[mzipse]

@lxwinspur actually, the Epic for this story is #1989 . There are a few other stories linked to this as well. You can see the linkages with the Zenhub plugin installed in your browser.