tree 4aab0c5423c05905a279008e3410551a9edc3e87
parent cd5a898fd4007212ce9e58ea9443071da494452e
author Myung Bae <myungbae@us.ibm.com> 1726241734 -0500
committer Ed Tanous <ed@tanous.net> 1726501654 +0000

Fix status for non-existent JsonSchema FileGet

This will fix the incorrect status 500 to status 404 for the
non-eixstent JsonSchema FileGet.

```
% redfishtool raw GET  -r ${bmc}  -u root -p 0penBmc -S Always /redfish/v1/JsonSchemas/ComputerSystem/ComputerSystem.v1_99_1.json
   redfishtool: Transport: Response Error: status_code: 500 -- Internal Server Error
   redfishtool: raw: Error getting response
```

This commit also refactor `Response::openFile()` to return `ec` so that
the caller can check the reason of the failure.

Tested:
- Verify redfishtool result for the non-existent JsonSchema file like
```
% redfishtool raw GET  -r ${bmc}  -u root -p 0penBmc -S Always /redfish/v1/JsonSchemas/<schema>/<non-existent-schema>.json
   redfishtool: Transport: Response Error: status_code: 404 -- Not Found
   redfishtool: raw: Error getting response
```
- Redfish Service validator passes

Change-Id: I98927c076bb6e7dfb3742183b4b3545e328d2657
Signed-off-by: Myung Bae <myungbae@us.ibm.com>