Remove unnecessary hashes in FactoryGirl Factories
Add a :valid_company Factory
Refactor CategoriesController spec
Use :valid_company factory where appropriate
Use FactoryGirl methods when possible
Use FactoryGirl associations instead of after_creates
Update CategoriesController spec
Update InvestorsController spec
Create Investments for FundingRounds
Update CompaniesController spec
Make :invested_funding_round factory
Create :valid_category factory
Break up CategoriesController specs
Break up InvestorsController specs
Break up CompaniesController specs
Fix rubocop errors