Prevent duplicate captcha validation

[richtier]

this task

[codecov-io]

Codecov Report

Merging #337 into master will increase coverage by 0.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #337      +/-   ##
==========================================
+ Coverage   98.54%   98.55%   +0.01%     
==========================================
  Files          46       46              
  Lines        2128     2145      +17     
==========================================
+ Hits         2097     2114      +17     
  Misses         31       31

Impacted Files	Coverage Δ
company/forms.py	100% <ø> (ø)	⬆️
exportopportunity/views.py	100% <100%> (ø)	⬆️
exportopportunity/forms.py	100% <100%> (ø)	⬆️
exportopportunity/tests/test_views.py	100% <100%> (ø)	⬆️

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