createFileRecord is not returning existing record

[cgendreau]

/harvestor/walker/file.go

createFileRecord includes a check to make sure the record doesn't exist. But, when it exists it return the temporary object created instead of the one from the database.

When processSidecarFromWalker resumes, it gets the temporary object and will break the FK when walker/sidecar will try to create the database entry for sidecar.

[cgendreau]

9a64b26