Wrong MD5 hash generated for containers / federations

[ChristosTsiotsias]

Description

The MD5 hashes generated in revision/files/original/info endpoints seem to be wrong.

Also the latest revision Id has to be returned in federation stats endpoint for it to be used from the plugin

Steps to replicate

• Upload one file in a container and get its hash
• Upload a second file in a container and get its hash

Current Behaviour

• The two hashes are the same

Expected Behaviour

• The two hashes should be different

[ChristosTsiotsias]

const file = await FilesManager.getFile(teamspace, collection, filename); 
const newHash = CryptoJs.MD5(file).toString();

in \src\v5\services\filesManager.js seems to be wrong

instead we could do

const file = await FilesManager.getFile(teamspace, collection, filename);
const wordArray = CryptoJs.lib.WordArray.create(file);
const newHash = CryptoJs.MD5(wordArray).toString();