commit cb0591457e1af5e79e8ac63770897ec1f25a1d51
author asmithakarun <asmithkr@in.ibm.com> Wed Jun 26 02:31:07 2019 -0500
committer asmithakarun <asmithkr@in.ibm.com> Wed Jun 26 03:06:54 2019 -0500
tree 5d32ac8536b492f757782786f923225ec32c10d1
parent 3ba5cd5ddaa2536ed583ee5ad47732d82577623f

Avahi: Adding Asset interface in the script to
generate unique hostname

xyz.openbmc_project.Inventory.Item.Bmc is a null
interface where the SerialNumber is not present.
xyz.openbmc_project.Inventory.Decorator.Asset
interface contains the SerialNumber and is replaced
in place of the former interface.

Tested by:

1. Finding SerialNumber in Inventory interface
   - busctl introspect xyz.openbmc_project.Inventory.Manager /xyz/openbmc_project/inventory/system/chassis/motherboard/boxelder/bmc

output:
   [[0;1;39mxyz.openbmc_project.Inventory.Decorator.Asset      [[0m interface -         -                  -
   .BuildDate                                          property  s         ""                 emits-change writable
   .Manufacturer                                       property  s         "IPS             " emits-change writable
   .Model                                              property  s         ""                 emits-change writable
   .PartNumber                                         property  s         "01DH137         " emits-change writable
   .SerialNumber                                       property  s         "YL10UF76W015    " emits-change writable

2. Finding hostname
   - hostname

output:
   witherspoon

Signed-off-by: asmithakarun <asmithkr@in.ibm.com>
Change-Id: I28d8ee4844654bbb3f0b90ffd5d71b7147726516