Archive of workflows

[ShatalovYaroslav]

During get Archive of workflows using GET /buckets/{bucketName}/resources
in name put the 'Give a list of name separated by comma to get them in an archive',
it will be created the archive of files without extension, name of file will correspond to name of object.
This logic is done as object in bucket can be any type.

But as improvement if the object's kind equals to'workflow', we can add '.xml' extension, if doesn't already exist in name.