Install Fabric

For some reason, validator run at the recent bmcweb bump[1] wasn't able
to download the schemas and hit:
```
/redfish/v1/Fabrics
FabricCollection
          Pass: 5
Failure: 1
          Show Results
Show Payload

NameValueResult

Schema Error: Unable to locate the schema definition for the 'Fabric.Fabric' type.FAILMembers@odata.count1PASSMembers@odata.nextLink[Not Present]SKIPNameFabric CollectionPASSOem[Not Present]SKIP

```

Fabric was added at 3132dacead0.

Long term it would be nice to get rid of this only install certain
schemas.. Separate discussion.

[1]: https://gerrit.openbmc.org/c/openbmc/openbmc/+/93063

Commands ran:

cd redfish-core/schema/dmtf/json-schema-installed
ln -fs ../json-schema/Fabric.v1_4_0.json Fabricv1_4_0.json
cd redfish-core/schema/dmtf/installed
ln -fs ../csdl/Fabric_v1.xml Fabric_v1.xml

Tested: Inspection only.

Change-Id: I8a36b978b7228238f7011beefd7d03f24a7839b1
Signed-off-by: Gunnar Mills <gmills@us.ibm.com>