(Improvement) Add test and coverage to the web-dapp

[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 web-dapp needed to be added coverage and tests.

• How does this pull request solve it (in broad terms)? This PR adds tests and coverage

• Does it close any open issues? Closes #40

• Quick checklist

  • [X ``` 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

[coveralls]

Pull Request Test Coverage Report for Build 163

• 150 of 197 (76.14%) changed or added relevant lines in 5 files are covered.
• 9 unchanged lines in 3 files lost coverage.
• Overall coverage increased (+22.7%) to 57.755%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
web-dapp/src/components/ConfirmationPage.js	49	61	80.33%
web-dapp/src/components/RegisterAddressPage.js	54	89	60.67%
<!--	Total:	150	197	76.14%	-->

Files with Coverage Reduction	New Missed Lines	%
web-dapp/src/components/RegisterAddressPage.js	1	70.89%
web-dapp/src/components/ConfirmationPage.js	1	77.39%
web-dapp/routes/notify_reg_tx.js	7	0.0%
<!--	Total:	9		-->

Totals
Change from base Build 154:	22.7%
Covered Lines:	630
Relevant Lines:	1077

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💛 - Coveralls