Inventory backup data restoration stub

This commit implements stub changes in wait-vpd-parsers service to check
for inventory backup data and restore it if found. On systems with
redundant BMCs, inv

Inventory backup data restoration stub

This commit implements stub changes in wait-vpd-parsers service to check
for inventory backup data and restore it if found. On systems with
redundant BMCs, inventory data will be synced from Active BMC to Passive
BMC by other service at a specific file path. When the old Passive BMC
is transitioning to Active, it needs to check for the backup data,
restore it and restart the inventory manager service. This commit only
includes stub changes, and actual changes will be handled in future
commits.

Change-Id: I1d22a4069614bed441b1b31fc02bc17c5279a5c8
Signed-off-by: Souvik Roy <souvikroyofficial10@gmail.com>

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Implementation of priming in wait-vpd-parsers

As part of PST priming system inventory and FRUs VPD collection will be
part of systemd target, instead of being triggered internally by
vpd-manager.

T

Implementation of priming in wait-vpd-parsers

As part of PST priming system inventory and FRUs VPD collection will be
part of systemd target, instead of being triggered internally by
vpd-manager.

This commit implements priming system blueprint in wait-vpd-parsers
application and removes the priming from vpd-manager initialization
flow.

```
Testing performed:
1. Removed PIM cache path in the system.
2. Restarted PIM service.
systemctl restart xyz.openbmc_project.Inventory.Manager
3. Observed inventory paths are removed under PIM using below command
busctl tree xyz.openbmc_project.Inventory.Manager
3. Restarted wait-vpd-parsers service
systemctl restart wait-vpd-parsers
4. Observed that system is primed again with all inventory object paths, using below command
busctl tree xyz.openbmc_project.Inventory.Manager
```

Change-Id: Ic93f54e909a247587208082830c5ebbe48f69f50
Signed-off-by: Anupama B R <anupama.b.r1@ibm.com>

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Prime system blueprint from wait-vpd-parsers

This commit updates wait-vpd-parsers to prime system blueprint.
As part of PST VPD collection flow, priming inventory objects needs to
be triggered as a

Prime system blueprint from wait-vpd-parsers

This commit updates wait-vpd-parsers to prime system blueprint.
As part of PST VPD collection flow, priming inventory objects needs to
be triggered as a part of systemd target, instead of being triggered by
vpd-manager.
This commit only implements only stub APIs under PrimeInventory class.

Change-Id: I144b13192e9ce39461c331c51ed7d4d9e952809c
Signed-off-by: Anupama B R <anupama.b.r1@ibm.com>

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