Sync Swagger with code and 2 enhancements

[callmekatootie]

1. Update Swagger to be in sync with the code Fix issues found during submission api wrapper contest #113
2. Provide sortyBy parameter when querying Need sortBy param for submissions endpoint #124
3. Change which attribute is used to name artifacts in submissions Change the name of the artifact #125

[callmekatootie]

@cwdcwd Let me know if I can merge this one. Please note the following:

Sort order default changed
- BEFORE: For submission resource alone, internally, we sort by created field, in ascending order. Other resources had no internal sort in place
- AFTER: For all resources (except review type, which does not have timestamps), internally sort by updated field, in descending order (also accepts explicit sort by other fields too)

Scorecard ID
- BEFORE: Across all resources, joi validation would allow string and number (but ES would throw error expecting it to be a number)
- AFTER: joi validation updated to enforcing this only to be a number

Sorting on text fields

• Review Type's name attribute is a text field in ES. However, sorting using this field throws the below error from ES:

{
    "message": "[illegal_argument_exception] Fielddata is disabled on text fields by default. Set fielddata=true on [name] in order to load fielddata in memory by uninverting the inverted index. Note that this can however use significant memory. Alternatively use a keyword field instead."
}

More information on this error can be found here. So, in review type, you cannot sort with name attribute for the moment.

Artifacts

• BEFORE: We used the artifact type id (which used to be the review type id) as the name of the artifact
• AFTER: We no longer accept the artifact type id. The artifact name is the filename itself (the artifact file that was uploaded - its name)