Make label and error messages for license-step accept-checkbox translatable

[toniprieto]

References

• Fixes Make label and error messages for license-step accept-checkbox available to i18n #1487

Description

Make label and error messages for license-step accept-checkbox translatable and add translation for English and Spanish.

Instructions for Reviewers

List of changes in this PR:

• Apply the changes suggested by @atarix83 in this comment to add the i18n keys: Make label and error messages for license-step accept-checkbox available to i18n #1487 (comment)
• Add the translation for English and Spanish
• Use the TranslateService in onSectionInit function to force the translation of the checkbox label

Include guidance for how to test or review your PR.

Start a new submission and check that the checkbox label and the error message that appears when the checkbox is unchecked are translated for Spanish and English.

Checklist

• My PR is small in size (e.g. less than 1,000 lines of code, not including comments & specs/tests), or I have provided reasons as to why that's not possible.
• My PR passes TSLint validation using yarn run lint
• My PR doesn't introduce circular dependencies
• My PR includes TypeDoc comments for all new (or modified) public methods and classes. It also includes TypeDoc for large or complex private methods.
• My PR passes all specs/tests and includes new/updated specs or tests based on the Code Testing Guide.
• If my PR includes new, third-party dependencies (in package.json), I've made sure their licenses align with the DSpace BSD License based on the Licensing of Contributions documentation.

[tdonohue]

👍 Thanks @toniprieto ! This looks great to me. I tested it as well, and it works...the license checkbox now can be translated.