Geo: small generalization to find path of replicable

What does this MR do?

Do not assume the attribute is named file. But instead, ask the replicator to ask the CarrierWaveUploader to tell what the path of the replicable file is.

Does this MR meet the acceptance criteria?

Conformity

• Changelog entry
• Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• Style guides
• Database guides
• Separation of EE specific content