mediafileuri with spaces in S3 object key fails to ingest

[kspurgin]

• First, need to replace any space character with %20 to make the mediafileuri valid
• Then, need to URL escape the resulting URI

Spaces should ultimately become %2520 because, as Ray explained: "Yes, because you’re putting a string containing % into the parameter of another URL. So the % needs to be escaped."

[kspurgin]

collectionspace-csv-importer uses mediafileuri from original data row, not the response from this application.

Same for collectionspace-migration-tools.

That means it doesn't make sense to fix this in collectionspace-mapper.

Also, it needs to be fixed in two different ways for the two tools. collectionspace-csv-importer makes API call through collectionspace-client, which handles final url encoding, so only the initial replacement of spaces with %20 needs to be handled. Sending through a fully escaped URL, which then gets re-escaped by collectionspace-client, will cause ingest error. collectionspace-migration-tools and the AWS Lambda function do not use the collectionspace-client, so the full url escaping needs to be handled.