Validate captcha values inside /request

[brucosper]

Moved captcha validation into the /request endpoint to prevent it from ever running without valid captcha

[codecov-commenter]

Codecov Report

Merging #116 (f85b5c2) into dev (61fb44c) will increase coverage by 0.01%.
The diff coverage is 41.17%.

@@            Coverage Diff             @@
##              dev     #116      +/-   ##
==========================================
+ Coverage   78.14%   78.16%   +0.01%     
==========================================
  Files          24       24              
  Lines        1254     1255       +1     
  Branches      238      238              
==========================================
+ Hits          980      981       +1     
+ Misses        242      240       -2     
- Partials       32       34       +2     

Impacted Files	Coverage Δ
api/resources/api_manager.py	62.71% <41.17%> (+0.31%)	⬆️

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