Duplicate File Hash Error Fix

[bonedaddy]

:construction_worker: Purpose

Closes https://github.com/RTradeLtd/Temporal/issues/420. Currently there is some ungraceful handling of people uploading a duplicate file. If the upload a duplicate file, we abort early and error out.

:rocket: Changes

Instead of aborting early and error out, we return a response as if the request was normally processed. Additionally this includes a fix for CMC deprecating their old api

:warning: Breaking Changes

I don't think there should be any breaking changes, since we're simply adjusting the response message and code sent back.

[codecov[bot]]

Codecov Report

Merging #463 into master will decrease coverage by 0.09%. The diff coverage is 57.36%.

@@            Coverage Diff             @@
##           master     #463      +/-   ##
==========================================
- Coverage   52.56%   52.47%   -0.08%     
==========================================
  Files          43       43              
  Lines        4253     4302      +49     
==========================================
+ Hits         2235     2257      +22     
- Misses       1519     1538      +19     
- Partials      499      507       +8

Impacted Files	Coverage Δ
api/v2/api.go	86.04% <ø> (ø)	:arrow_up:
api/v2/routes_rtfsp_usage.go	34.33% <0%> (ø)	:arrow_up:
api/v2/routes_rtfs.go	36.91% <0%> (ø)	:arrow_up:
api/v2/routes_payment.go	25.78% <100%> (ø)	:arrow_up:
utils/cmc.go	54.44% <53.58%> (-16.15%)	:arrow_down:
api/v2/utils.go	51.36% <75%> (+0.66%)	:arrow_up:

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