Consume DMTF property "GeneratedBy" for the dump entries

[sunharis]

This is a story to work on moving the OEM "GeneratedBy" property to the DMTF standard property - after we get the standard published.
Originated from ibm-openbmc/bmcweb#136

[sunharis]

Need to implement the below properties https://redfish.dmtf.org/schemas/v1/LogEntry.v1_11_0.json

            "Originator": {
                "description": "The source of the log entry.",
                "longDescription": "This property shall contain the source of the log entry.",
                "readonly": true,
                "type": "string",
                "versionAdded": "v1_11_0"
            },
            "OriginatorType": {
                "$ref": "#/definitions/OriginatorTypes",
                "description": "The type of originator data.",
                "longDescription": "This property shall contain the type of originator data.",
                "readonly": true,
                "versionAdded": "v1_11_0"
            },

[sunharis]

https://gerrit.openbmc.org/c/openbmc/phosphor-dbus-interfaces/+/47057
https://gerrit.openbmc.org/c/openbmc/phosphor-dbus-interfaces/+/54955
https://gerrit.openbmc.org/c/openbmc/phosphor-debug-collector/+/48337

[sunharis]

Migrate-Yes

[rfrandse]

tracking in jira