(Improvement) Add tests to API's routes

[garatortiz]

• What is it? (leave one option)

  • (Improvement) of existing functionality

• What was the root cause of the problem originally / what feature was missing? The 3 files of the routes were refactored but do not have any tests to provide coverage.

• How does this pull request solve it (in broad terms)? Adds tests + coverage.

• Does it close any open issues? Closes #74

• Quick checklist

  • [X] eslint shows no errors

    cd web-dapp
    eslint .

  • [X] docs were updated where necessary OR they don't need to be updated
  • [X] tests were updated where necessary OR they don't need to be updated

• Additional information

[phahulin]

contract-output.json is specific to particular deployment, so it should probably be out of version control (if that's possible), or at least be empty {}

[coveralls]

Pull Request Test Coverage Report for Build 217

• 1 of 1 (100.0%) changed or added relevant line in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+10.2%) to 67.935%

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Totals
Change from base Build 170:	10.2%
Covered Lines:	763
Relevant Lines:	1077

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💛 - Coveralls

[phahulin]

Could you do the same hocus-pocus as server-config-private.js with contract-output.json? i.e. put some test version of the file in web-dapp/test/server/_utils/ add cp ... to before_script in travis.yml and then remove contract-output.json from repository? Also fix its path in .gitignore (now it's missing web-dapp/src/)